TIGER

Videos: 188 results
Phase Changes  
By using a coolant at a temperature below the boiling point of the gases chlorine, bromine and iodine, the gases are condensed into liquid form.
Phases / Phase Transitions / Diagrams
Critical Point of Benzene  
A sealed tube containing benzene liquid and vapor is heated. As the critical temperature is approached, the meniscus flattens. At the critical temperature the meniscus disappears, and separate liquid and vapor phases can no longer be detected.
Phases / Phase Transitions / Diagrams
Steam and Superheated Steam  
When a gas burner heats the steam coil strongly, the steam becomes superheated and is at a high enough temperature to ignite a match and react quickly with steel wool
Gases |
Phases / Phase Transitions / Diagrams
Superconductivity  
A pellet of 1-2-3 yttrium barium copper oxide (YBa2Cu3O7-x) is cooled with liquid nitrogen. A magnet placed above the pellet is levitated. At a higher temperature the magnet rests on the pellet, but cooling once again causes the magnet to rise. The levitated magnet is spun with plastic tweezers
Phases / Phase Transitions / Diagrams |
Superconductivity
Vapor Pressure: Drinking Bird  
A novelty store "Drinking Bird" repeatedly dips is beak into a beaker of water and then bobs back to an upright position. Visible movement of a liquid in the bird's body accompanies the bobbing; the movement is caused by changing vapor pressure of the liquid due to different temperatures at the bird's head and the bird's body.
Liquids |
Phases / Phase Transitions / Diagrams
Atmospheric Pressure  
Atmospheric pressure is used to collapse large and small metal containers.
Phases / Phase Transitions / Diagrams |
Gases |
Atmospheric Chemistry
Vapor Pressure  
Pressure exerted by vapor of several organic substances is demonstrated using barometers. Molecular models of the substances are shown.
Gases |
Phases / Phase Transitions / Diagrams |
Physical Properties
Liquefaction of Carbon Dioxide  
Dry ice is placed into an acrylic plastic cylinder. A valve is closed and pressure in the cylinder increases. When the pressure reaches 350 kPa (50 psi) it stops increasing and liquid CO2 appears.
Equilibrium |
Phases / Phase Transitions / Diagrams |
Physical Properties
Boiling by Cooling  
A flask contains water and water vapor at 100C. Each time ice water is poured over the outside of the flask, the water inside the flask boils. Although the temperature of the water in the flask has decreased, in each instance boiling is observed.
Gases |
Liquids |
Phases / Phase Transitions / Diagrams
Vapor Pressure: Molecular Size  
The measurement of pressure exerted by a vapor is demonstrated using barometers. Vapor pressure varies with the strength of the intermolecular forces in the liquid.
Gases |
Liquids |
Noncovalent Interactions |
Phases / Phase Transitions / Diagrams |
Physical Properties
Vapor Pressure of a Mixture: Raoult's Law  
The measurement of pressure exerted by a vapor is demonstrated using barometers. Vapor pressure varies with the strength of the intermolecular forces in the liquid. In this section we will look at vapor pressure of mixtures. We can calculate the vapor pressure of a mixture using Raoult's law.
Gases |
Liquids |
Noncovalent Interactions |
Phases / Phase Transitions / Diagrams |
Physical Properties
Thermochromism: Mercury(II) Iodide  
When red-orange Mercury(II) Iodide (HgI2) is heated, it undergoes a phase transition at 126oC to a pale yellow form. As the heated sample cools, it gradually returns to the original red-orange color.
Crystals / Crystallography |
Phases / Phase Transitions / Diagrams |
Physical Properties |
Solid State Chemistry |
Solids |
Descriptive Chemistry
Enthlapy-Thermodynamics  
Reactions and demonstrations the explore thermodynamic concepts.
Precipitation / Solubility |
Solutions / Solvents |
Calorimetry / Thermochemistry |
Applications of Chemistry |
Acids / Bases |
Physical Properties |
Reactions |
Thermodynamics |
Gases |
Phases / Phase Transitions / Diagrams |
Water / Water Chemistry |
Liquids |
Solids |
pH |
Consumer Chemistry |
Kinetics |
Oxidation / Reduction
Lighting and Adjusting a Gas Burner  
Lighting, adjusting, and extinguishing a gas burner are shown. Combustion of methane is demonstrated.
Laboratory Equipment / Apparatus
Heating a Test Tube  
Proper techniques for heating a test tube containing liquid in a gas burner are demonstrated.
Laboratory Equipment / Apparatus
Gas-Burner Safety  
Safety concerns for using the gas burner are presented.
Laboratory Equipment / Apparatus
Gas Burner  
Lighting and adjusting a gas burner, using a burner to heat liquids in glass containers, and burner safety are demonstrated and discussed.
Laboratory Equipment / Apparatus
Hot Plate Safety  
Safety concerns in using a hot plate are presented.
Laboratory Equipment / Apparatus
Hot Plate  
The use of a combination hot plate/magnetic stirrer is demonstrated. Safety concerns are discussed.
Laboratory Equipment / Apparatus
Reactions: Reflux at Constant Temperature  
The technique of refluxing a reaction mixture is demonstrated.
Laboratory Equipment / Apparatus
Heating-Cooling  
Gas burners, hot plates, steam baths, and ice baths are demonstrated along with the technique of refluxing.
Laboratory Equipment / Apparatus
Obtaining a Liquid Sample (Procedures and Mistakes)  
These movies are designed to show both appropriate and inappropriate laboratory procedures. They can be used in testing to have student spot errors or select correct procedures.
Laboratory Equipment / Apparatus
Pouring  
Techniques for pouring liquids and solids are demonstrated.
Laboratory Equipment / Apparatus
Solid from Dish to Beaker to Volumetric Flask  
Steps in the preparation of a solution include the quantitative transfer of a solid from a weighing dish to beaker, dissolving the solid, transfer of the solution to a volumetric flask, dilution to the mark, and mixing.
Laboratory Equipment / Apparatus
Solid from Dish to Volumetric Flask  
Steps in the preparation of a solution include the quantitative transfer of a solid from a weighing dish to a volumetric flask, dilution to the mark, and mixing.
Laboratory Equipment / Apparatus
Transfer and Dissolve a Solid Sample (Procedures and Mistakes)  
Correctly and incorrectly performed steps in transferring and dissolving a solid sample are shown.
Laboratory Equipment / Apparatus
Transferring a Solid  
Several techniques for transferring solid while weighing and for transferring solid from weighing dish into a solution are demonstrated.
Laboratory Equipment / Apparatus
Mohr Pipet  
A Mohr pipet is used to transfer liquid samples.
Laboratory Equipment / Apparatus
Digital Pipettors  
Digital pipettors deliver liquids in volumes from 1 mL to 1 µL in an accurate and reproducible manner.
Laboratory Equipment / Apparatus
Quantitative Transfer  
Techniques for quantitative transfer of solids and liquids are demonstrated.
Laboratory Equipment / Apparatus
Transferring Samples  
Techniques for ordinary and quantitative transfer of solids and liquids are demonstrated.
Laboratory Equipment / Apparatus
Conductivity Meter  
The use of a conductivity meter is demonstrated.
Conductivity |
Laboratory Equipment / Apparatus
Is the Balance Door Closed (Procedures and Mistakes)  
The balance door must be closed in order to obtain a stable reading. Both appropriate and inappropriate examples are included.
Laboratory Equipment / Apparatus
Taring (Procedures and Mistakes)  
The tare button sets the mass of whatever is on the balance pan to zero. Both appropriate and inappropriate examples are included.
Laboratory Equipment / Apparatus
Weighing Some Different Masses (Procedures and Mistakes)  
Several different masses are weighed on an analytical balance. Some are much too large or much too small if the assignment is to weigh out a 0.5 g sample.
Laboratory Equipment / Apparatus
Record Balance Reading (Procedures and Mistakes)  
These movies show balance readings recorded correctly and incorrectly.
Laboratory Equipment / Apparatus
Top-Loading Balance  
Techniques using a top-loading balance to weigh solids are demonstrated.
Laboratory Equipment / Apparatus
Weighing Vessels  
Various weighing containers are discussed.
Laboratory Equipment / Apparatus
Keeping the Balance and Weighing Vessel Clean  
The importance of cleanliness of the balance and weighing vessel is discussed.
Laboratory Equipment / Apparatus
Avoiding Contamination  
Material should not be returned to the reagent bottle.
Laboratory Equipment / Apparatus
Top-Loading Balance with Draft Shield  
Procedures are demonstrated for using a top-loading balance with a draft shield.
Laboratory Equipment / Apparatus
pH Meter  
The use of a pH meter is demonstrated.
Laboratory Equipment / Apparatus |
pH
pH  
The use of pH meters and pH paper to measure the pH of solutions is demonstrated.
Laboratory Equipment / Apparatus |
pH
Constructing Mercury Barometers  
Barometers are constructed using glass tubes filled with mercury. Two methods are used to fill the tubes and differently shaped tubes are used.
Laboratory Equipment / Apparatus
Barometer  
The use of a mercury barometer to measure air pressure is demonstrated.
Laboratory Equipment / Apparatus
Pressure  
Use of a mercury barometer and a McLeod gauge manometer are demonstrated.
Laboratory Equipment / Apparatus
Recording Data  
A chart recorder records voltage versus time, often from an instrument such as a gas chromatograph or a spectrophotometer.
Laboratory Equipment / Apparatus
Spectroscope  
The use of a hand-held spectroscope is demonstrated.
Laboratory Equipment / Apparatus |
Spectroscopy
Spectronic 20 Spectrophotometer  
The use of a Spectronic 20 spectrophotometer is demonstrated.
Laboratory Equipment / Apparatus |
Spectroscopy
Single-Beam Recording Spectrophotometer  
Techniques involved in using a single-beam UV/visible spectrophotometer are demonstrated.
Laboratory Equipment / Apparatus |
Spectroscopy
Spectroscopy  
Measuring electromagnetic emissions and transmissions with several different instruments are demonstrated or described.
Laboratory Equipment / Apparatus |
Spectroscopy
Sample Preparation  
A solid sample is prepared and loaded into a capillary tube before its melting point is measured.
Laboratory Equipment / Apparatus
Thermometer  
The range of the thermometer and heating rates measured by thermometers are demonstrated.
Laboratory Equipment / Apparatus
Mel-Temp  
The Mel-Temp melting point apparatus is demonstrated.
Laboratory Equipment / Apparatus
Thomas Hoover Melting Point Apparatus  
The Hoover melting point apparatus is demonstrated.
Laboratory Equipment / Apparatus
Controlling the Temperature  
The need and methods to control the heating rate near the melting point of the solid are demonstrated.
Laboratory Equipment / Apparatus
Melting Point Apparatus  
Equipment and techniques used to measure the melting range of a solid are demonstrated. These include the Mel-Temp and the Thomas Hoover Apparatus.
Laboratory Equipment / Apparatus
Temperature  
Use of a thermometer is demonstrated with examples including the use of melting point apparatuses and calorimeters.
Laboratory Equipment / Apparatus
Rinsing and Filling a Buret  
Techniques for rinsing and filling a buret are demonstrated.
Laboratory Equipment / Apparatus
Reading a Buret  
Examples of reading a buret are presented.
Laboratory Equipment / Apparatus
Stopcock  
Techniques for using and adjusting stopcocks are demonstrated.
Laboratory Equipment / Apparatus
Inspecting the Buret (Procedures and Mistakes)  
Students should carefully inspect a buret and stopcock before use. Both appropriate and inappropriate examples are included.
Laboratory Equipment / Apparatus
Inspect and Adjust the Stopcock (Procedures and Mistakes)  
A stopcock should be inspected and adjusted if necessary. Both appropriate and inappropriate examples are included.
Laboratory Equipment / Apparatus
Rinsing the Buret with Water (Procedures and Mistakes)  
Before use, a buret should be inspected, rinsed with distilled water, and washed if necessary. Both appropriate and inappropriate examples are included.
Laboratory Equipment / Apparatus
Rinsing the Buret with Titrant (Procedures and Mistakes)  
The buret walls and tip should be thoroughly rinsed with a small amount of titrant. Both appropriate and inappropriate examples are included.
Laboratory Equipment / Apparatus
Filling the Buret With Titrant (Procedures and Mistakes)  
Alternate methods of filling a buret with and without a funnel are shown. Both appropriate and inappropriate examples are included.
Laboratory Equipment / Apparatus
Buret Use (Procedures and Mistakes)  
Correctly and incorrectly performed steps using a buret are shown.
Laboratory Equipment / Apparatus
Mohr Pipet Topics  
Techniques for using the Mohr pipet are demonstrated.
Laboratory Equipment / Apparatus
Filling a Mohr Pipet (Procedures and Mistakes)  
Liquid is drawn into a pipet. Both appropriate and inappropriate examples are included.
Laboratory Equipment / Apparatus
Rinsing the Mohr Pipet with Sample (Procedures and Mistakes)  
The Mohr pipet must be thoroughly rinsed with a small portion of sample solution. Both appropriate and inappropriate examples are included.
Laboratory Equipment / Apparatus
Using the Mohr Pipet to Transfer Sample (Procedures and Mistakes)  
The use of a Mohr pipet to transfer solution is demonstrated. Both appropriate and inappropriate examples are included.
Laboratory Equipment / Apparatus
Mohr Pipet Use (Procedures and Mistakes)  
Correctly and incorrectly performed steps in using a Mohr pipet are shown.
Laboratory Equipment / Apparatus
Filling a Volumetric Pipet (Procedures and Mistakes)  
Liquid is drawn into a pipet. Both appropriate and inappropriate examples are included.
Laboratory Equipment / Apparatus
Rinsing the Volumetric Pipet with Sample (Procedures and Mistakes)  
The volumetric pipet must be thoroughly rinsed with a small portion of sample solution. Both appropriate and inappropriate examples are included.
Laboratory Equipment / Apparatus
Using the Volumetric Pipet to Transfer Sample (Procedures and Mistakes)  
The use of a volumetric pipet to transfer solution is demonstrated. Both appropriate and inappropriate examples are included.
Laboratory Equipment / Apparatus
Volumetric Pipet Use (Procedures and Mistakes)  
Correctly and incorrectly performed steps in using a volumetric pipet are shown.
Laboratory Equipment / Apparatus
3-Way Pipet Bulb  
Use of a 3-way bulb to draw liquid into a pipet is demonstrated.
Laboratory Equipment / Apparatus
Pipet Bulbs  
Standard and three-way bulbs used to fill pipets are demonstrated.
Laboratory Equipment / Apparatus
Dissolving Solute and Diluting the Solution  
Techniques for dissolving solute and diluting solution in a volumetric flask are presents. Some common errors are also shown.
Laboratory Equipment / Apparatus
Filling a Volumetric Flask  
Techniques for filling a volumetric flask to the mark are demonstrated.
Laboratory Equipment / Apparatus
Using a Volumetric Flask  
Use of a volumetric flask is demonstrated.
Laboratory Equipment / Apparatus
Loading and Unloading a Centrifuge  
Techniques for loading and unloading a centrifuge are demonstrated.
Laboratory Equipment / Apparatus
Removing Supernatant and Washing Precipitate  
After separating in a centrifuge, the supernatant liquid can be removed from the solid.
Laboratory Equipment / Apparatus
Preparation  
A chromatography chamber is prepared and the sample to be separated is spotted onto paper.
Chromatography |
Laboratory Equipment / Apparatus
Developing the Chromatogram  
Paper is placed in the chromatography tank and the chromatogram develops.
Chromatography |
Laboratory Equipment / Apparatus
Paper Chromatography  
Techniques used in paper chromatography are demonstrated.
Chromatography |
Laboratory Equipment / Apparatus
Identify and Interpret  
Methods to interpret the chromatogram and identify the separated spots are presented.
Chromatography |
Laboratory Equipment / Apparatus
Thin Layer Chromatography  
Techniques used in Thin Layer Chromatography are demonstrated.
Chromatography |
Laboratory Equipment / Apparatus
Simple Distillation  
A simple distillation is demonstrated.
Laboratory Equipment / Apparatus
Distillation at Reduced Pressure  
Distillation under partial vacuum is demonstrated.
Laboratory Equipment / Apparatus
Using a Rotary Evaporator  
The use of a rotary evaporator is demonstrated.
Laboratory Equipment / Apparatus
Using a Separatory Funnel (Version 1)  
Use of a separatory funnel is demonstrated and helpful hints are given.
Laboratory Equipment / Apparatus
Using a Separatory Funnel (Version 2)  
Use of a separatory funnel to isolate a product of a chemical reaction by liquid extraction is demonstrated.
Laboratory Equipment / Apparatus
Example of Extraction of an Acid-Base Indicator  
An acid–base indicator is shown to concentrate in the aqueous phase when ionized and in the nonpolar phase when molecular.
Laboratory Equipment / Apparatus
Equipment  
Equipment needed for gravity filtration is illustrated.
Laboratory Equipment / Apparatus
Folding Filter Paper (main)  
Several methods of folding filter paper are shown.
Laboratory Equipment / Apparatus
Filtering  
Several gravity filtration processes are shown.
Laboratory Equipment / Apparatus
Gravity Filtration  
Gravity filtration techniques are shown.
Laboratory Equipment / Apparatus
Assembling Equipment  
Too different sets of equipment for vacuum filtration are assembled.
Laboratory Equipment / Apparatus
Applying and Releasing a Vacuum from a Vacuum Pump  
Vacuum is applied and released using a vacuum pump.
Laboratory Equipment / Apparatus
Applying and Releasing a Vacuum from an Aspirator  
Vacuum is applied and released using a water aspirator.
Laboratory Equipment / Apparatus
Recovering Solid  
After filtering, solid is removed from funnel and filter paper.
Laboratory Equipment / Apparatus
Vacuum Filtration  
Vacuum filtration techniques are shown.
Laboratory Equipment / Apparatus
Select the Solvent  
Selection of an appropriate recrystallization solvent is demonstrated.
Laboratory Equipment / Apparatus
Cool the Solution  
In most cases, crystals form as the solution is cooled, but sometimes it is necessary to induce crystallization.
Laboratory Equipment / Apparatus
Filter and Dry the Crystals  
The crystals are filtered using vacuum filtration and then dried.
Laboratory Equipment / Apparatus
Single-Solvent Method  
The steps in a single-solvent recrystallization are demonstrated.
Laboratory Equipment / Apparatus
Two-Solvent Method  
The steps in a two-solvent recrystallization are demonstrated.
Laboratory Equipment / Apparatus
Eye Protection  
Hazards to eyes in the chemistry laboratory include exposure to chemicals from vapors and splashed liquids, impact from broken glass and other solids in the event of an explosion, and exposure to ultraviolet lamps.
Laboratory Equipment / Apparatus
Handling and Mixing Chemicals  
An introduction to safe handling and mixing of chemicals is presented. This includes adding water to acid, mixing chemicals in a flask, and mixing chemicals in a separatory funnel.
Laboratory Equipment / Apparatus
Handling Glassware  
These movies are related to the safe handling of laboratory glassware. They include not putting glassware on the edge of a lab bench, not heating cracked glassware, not touching hot glass, creating a vacuum safely, and making separatory funnel protectors.
Laboratory Equipment / Apparatus
Heating and Hot Items  
Heat sources and hot items must be used with caution to avoid fires, burns, and other problems. Included here are a demonstration of hot glass, safety concerns with the gas chromatograph, use of boiling stones, and gas burner and hot plate safety.
Laboratory Equipment / Apparatus
Loose Clothing, Hair, and Jewelry  
Loose clothing, hair, and jewelry present hazards in the laboratory as they can become tangled in equipment, dip into chemicals, or come into contact with a heat source and catch fire. Several examples demonstrate these dangers.
Laboratory Equipment / Apparatus
Safe Lab Setting  
Here are examples of unsafe laboratory conditions including a cluttered work area, glassware on the edge of a lab bench, an unbalanced centrifuge in operation, food containers, open reagent bottles, and an unsecured gas cylinder.
Laboratory Equipment / Apparatus
Safety  
Safe and unsafe conditions and practices are shown. Topics include eye protection, handling and mixing chemicals, handling glassware, heating and handling hot items, loose clothing, hair, and jewelry, pipetting, and maintenance of a safe laboratory setting.
Laboratory Equipment / Apparatus
Quantitative Transfer of a Solid with a Weighing Spoon  
A weighing spoon is used to quantitatively transfer a solid that is being weighed.
Laboratory Equipment / Apparatus
Quantitative Transfer of a Solid with a Finger-Held Weighing Bottle  
A solid is quantitatively transferred using a finger-held weighing bottle.
Laboratory Equipment / Apparatus
Quantitative Transfer of a Solid with a Paper Strap-Held Bottle  
A solid is quantitatively transferred using a paper strap-held bottle.
Laboratory Equipment / Apparatus
Quantitative Transfer of a Solid with a Spatula  
A spatula is used to quantitatively transfer a solid to be weighed.
Laboratory Equipment / Apparatus
Quantitative Weighing Errors  
Three common errors in weighing are demonstrated: using a container that is too large, improper or inconsistent use of the tare function and failure to open and close the balance door.
Laboratory Equipment / Apparatus
Transferring a 25-Milliliter Sample  
A 25-milliliter volumetric pipet is used to remove a sample from a volumetric flask and transfer it to an Erlenmeyer flask.
Laboratory Equipment / Apparatus
Variations in Technique for Handling Stopcocks  
Three techniques for using stopcocks including right and left hand control are demonstrated.
Laboratory Equipment / Apparatus
Centrifuging a Sample  John W. Moore, Jerrold J. Jacobsen, Lois M. Browne, John F. Zimmerman
The demonstration on this page shows a technique that should not be used by undergraduate chemistry laboratory. This video shows what happens to sample in a centrifuge while the centrifuge is on, and the result of stopping the centrifuge improperly. A narrative is included in this video: The centrifuging process allows the solvent to completely settle out. The jarring caused by hand braking destroys the distinct separation between supernatant and solid.
Separation Science |
Laboratory Equipment / Apparatus
Mixing  
Mechanical and manual techniques for mixing substances are demonstrated.
Laboratory Equipment / Apparatus |
Quantitative Analysis
Magnetic Stirrer  
A magnetic stirrer is used to mix liquids. Some possible problems in using the stirrer are presented.
Laboratory Equipment / Apparatus |
Quantitative Analysis
Manipulating-Transferring Samples  
Laboratory equipment and techniques used to heat, cool, mix, and transfer samples of liquids and solids are shown.
Laboratory Equipment / Apparatus |
Quantitative Analysis
Quantitative Weighing of a Solid Sample  
Techniques for quantitatively transferring solid while weighing are demonstrated.
Laboratory Equipment / Apparatus |
Quantitative Analysis
Analytical Balance  
Procedures for using an analytical balance to accurately weigh solid samples are demonstrated.
Laboratory Equipment / Apparatus |
Quantitative Analysis
Mass  
Three types of electronic balances are demonstrated.
Laboratory Equipment / Apparatus |
Quantitative Analysis
Calorimeter  
A coffee-cup calorimeter is demonstrated.
Calorimetry / Thermochemistry |
Laboratory Equipment / Apparatus
Precision of Measurement  
The precision of several types of glassware for measuring volume is demonstrated and discussed.
Laboratory Equipment / Apparatus |
Quantitative Analysis
Buret  
Techniques required to use a buret are demonstrated.
Laboratory Equipment / Apparatus |
Quantitative Analysis
Volumetric Pipet Topics  
Techniques for using a volumetric pipet to transfer a known volume of liquid are demonstrated.
Laboratory Equipment / Apparatus |
Quantitative Analysis
Volumetric Pipet  
Use of volumetric pipets is demonstrated.
Laboratory Equipment / Apparatus |
Quantitative Analysis
Pipets  
Mohr pipets, volumetric pipets, pipet bulbs, and digital pipettors are demonstrated.
Laboratory Equipment / Apparatus |
Quantitative Analysis
Quantitative Preparation of a Solution with a Solid and Deionized Water  
Two methods of quantitative preparation a solution from a weighed solid sample are demonstrated.
Laboratory Equipment / Apparatus |
Quantitative Analysis
Volumetric Flask  
The purpose of the volumetric flask is discussed and its use is demonstrated.
Laboratory Equipment / Apparatus |
Quantitative Analysis
Volume  
Burets, graduated cylinders, pipets, and volumetric flasks are demonstrated.
Laboratory Equipment / Apparatus |
Quantitative Analysis
Measuring  
Measurement of electrical properties, mass, pH, pressure, volume, and temperature are demonstrated along with examples of recording data, spectroscopy, and titration.
Laboratory Equipment / Apparatus |
Quantitative Analysis
Centrifuge  
Centrifuging safety considerations, centrifuging a sample, loading and unloading a centrifuge, removing the supernatant, and washing the precipitate are discussed and demonstrated.
Laboratory Equipment / Apparatus |
Separation Science
Gas Chromatograph  
Operation of a gas chromatograph is demonstrated.
Gas Chromatography |
Laboratory Equipment / Apparatus
Distillation  
Here we consider distillation including simple distillation, distillation at reduced pressure and using a rotary evaporator.
Laboratory Equipment / Apparatus |
Separation Science
Extraction  
Use of a separatory funnel to carry out extraction is demonstrated.
Laboratory Equipment / Apparatus |
Separation Science
Filtration  
Gravity and vacuum filtration are demonstrated.
Laboratory Equipment / Apparatus |
Separation Science
Recrystallization  
Recrystallization procedures using a single solvent and using two solvents are demonstrated.
Laboratory Equipment / Apparatus |
Separation Science
Separating and Purifying  
Laboratory processes frequently used to separate mixtures or purify substances including centrifuging, chromatography, distillation, extraction, filtration, and recrystallization are demonstrated.
Laboratory Equipment / Apparatus |
Separation Science
Quantitative Weighing  
Techniques for quantitatively transferring solid while weighing are demonstrated.
Laboratory Equipment / Apparatus |
Quantitative Analysis
Quantitative Techniques in Volumetric Analysis  
Here are demonstrations of various techniques of quantitative weighing and transferring solids, transferring liquids and volumetric titration.
Laboratory Equipment / Apparatus |
Quantitative Analysis
Electrochemical Cells  
Techniques involved in measuring the voltage of an electrochemical cell and some common errors in constructing electrochemical cells are demonstrated.
Electrolytic / Galvanic Cells / Potentials |
Laboratory Equipment / Apparatus
Measuring Relative Viscosity  
The rate of flow of six different liquids through a Mohr pipet is measured.
Liquids |
Physical Properties |
Laboratory Equipment / Apparatus
Mistakes in Constructing Electrochemical Cells  
These movies are designed to show inappropriate laboratory procedures. They can be used in testing to have student spot errors.
Electrolytic / Galvanic Cells / Potentials |
Laboratory Equipment / Apparatus
Weigh a Solid Sample (Procedures and Mistakes)  
Correctly and incorrectly performed steps in weighing a solid sample are shown.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Phenolphthalein  
Animations show the color change due to phenolphthalein in several acid-base titrations.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Bromophenol Blue  
Animations show the color change due to bromophenol blue in several acid-base titrations.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Methyl Orange  
Animations show the color change due to methyl orange in several acid-base titrations.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Bromthymol Blue  
Animations show the color change due to bromthymol blue in several acid-base titrations.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Alizarin Yellow GG  
Animations show the color change due to alizarin yellow GG in several acid-base titrations.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Crystal Violet  
Animations show the color change due to crystal violet in several acid-base titrations.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Titration Curves - Colors of Indicators - Animations  
These animations show how the indicator color in a titration flask changes as titrant is added.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Titration Curves  
Drawing titration curves, titration curves for various types of acid-base titration, and depictions of color change observed during a titration using several different pH indicators are presented.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Titration Techniques  
Techniques and concepts important in titrations are demonstrated and discussed.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Prepare the Buret (Procedures and Mistakes)  
The buret and stopcock must be inspected and the buret rinsed prior to use. Both appropriate and inappropriate examples are included.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Obtaining Titrant (Procedures and Mistakes)  
Students should obtain the needed amount of titrant in a beaker that was first rinsed with titrant. Both appropriate and inappropriate examples are included.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Adding the Indicator (Procedures and Mistakes)  
It is crucial that indicator be added to the sample to be titrated. Both appropriate and inappropriate examples are included.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Prepare for Titration (Procedures and Mistakes)  
Steps illustrated include obtaining titrant, rinsing a buret, filling a buret, and adding indicator. Both appropriate and inappropriate examples are included.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Viewing Meniscus At Eye Level  
Here is what the student would see if the meniscus were viewed from eye level.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Do Not View Meniscus From Above  
Here is what the student would see if the meniscus were viewed from above.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Do Not View Meniscus From Below  
Here is what the student would see if the meniscus were viewed from below.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Initial Buret Reading (Procedures and Mistakes)  
The meniscus should be viewed from eye level with a consistent background and recorded in the laboratory notebook. Both appropriate and inappropriate examples are included.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Beginning the Titration (Procedures and Mistakes)  
Steps at the start of a titration are shown. Both appropriate and inappropriate examples are included.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Deliver Five Second Flow (Procedures and Mistakes)  
A five second flow of titrant is delivered and several possible results are presented.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Deliver Long Squirt (Procedures and Mistakes)  
A long squirt (about 0.7 seconds) of titrant is delivered and several possible results are presented.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Deliver Quick Squirt (Procedures and Mistakes)  
A quick squirt of titrant is delivered and several possible results are presented.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Deliver Quickly Flowing Drops (Procedures and Mistakes)  
Quickly flowing drops (about 2 per second) of titrant are delivered and several possible results are presented.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Deliver Slowly Flowing Drops (Procedures and Mistakes)  
Slow flowing drops of titrant are delivered and several possible results are presented.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Deliver One Drop (Procedures and Mistakes)  
One drop of titrant is delivered and two possible results are presented.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Touch off (Procedures and Mistakes)  
The last hanging drop of titrant is touched off and rinsed down and several possible results are presented.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Wash Down Titrant (Procedures and Mistakes)  
The sides of the flask are rinsed to be sure all titrant delivered is in bottom of the flask and several possible results are shown.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Delivering Titrant (Procedures and Mistakes)  
Several techniques for delivering titrant are demonstrated. Both appropriate and inappropriate examples are included.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Final Buret Reading (Procedures and Mistakes)  
The meniscus should be read in the same manner as the initial reading. Both appropriate and inappropriate examples are included.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Perform Titration (Procedures and Mistakes)  
The steps in a titration include reading and recording the initial volume, delivering titrant, observing the endpoint, and reading and recording the final buret volume. Both appropriate and inappropriate examples are included.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Titration (Procedures and Mistakes)  
Correctly and incorrectly performed steps in a titration are shown.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
Chromatography  
Chromatographic techniques including the gas chromatography, paper chromatography, and thin layer chromatography are demonstrated.
Chromatography |
Separation Science |
Laboratory Equipment / Apparatus
Transferring a Liquid  
Quantitative transfer of a liquid with a Mohr pipet, a volumetric pipet, and a digital pipettor is demonstrated.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis |
Applications of Chemistry |
Quantitative Analysis
Electrical Properties  
Use of the conductivity meter and techniques for measuring voltage of electrochemical cells are demonstrated.
Conductivity |
Laboratory Equipment / Apparatus |
Electrolytic / Galvanic Cells / Potentials
A Complete Acid-Base Titration  
A solid acid is dissolved in deionized water and titrated with sodium hydroxide solution using the color change of an indictor to determine the endpoint.
Laboratory Equipment / Apparatus |
Quantitative Analysis |
Titration / Volumetric Analysis |
Acids / Bases
Titration  
A large number of movies and images dealing with titration procedures and techniques are presented.
Laboratory Equipment / Apparatus |
Quantitative Analysis |
Titration / Volumetric Analysis
Oxidation-Reduction (Redox) Reactions  
Demonstrations exploring oxidation/reduction chemistry.
Aqueous Solution Chemistry |
Electrochemistry |
Oxidation / Reduction |
Water / Water Chemistry |
Acids / Bases |
pH |
Conductivity |
Reactions |
Applications of Chemistry |
Descriptive Chemistry |
Electrolytic / Galvanic Cells / Potentials |
Laboratory Equipment / Apparatus