| Videos: 72 results |
Solutions
Reactions and demonstrations exploring the concepts of solutions.
Noncovalent Interactions |
Physical Properties |
Precipitation / Solubility |
Solutions / Solvents |
Calorimetry / Thermochemistry |
Applications of Chemistry |
Acids / Bases |
Aqueous Solution Chemistry |
pH |
Conductivity |
Reactions |
Titration / Volumetric Analysis |
Liquids |
Solids |
Equilibrium |
Transport Properties
|
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.
Quantitative Analysis |
Titration / Volumetric Analysis |
Acids / Bases
|
Conductimetric Titration
Aqueous sulfuric acid and barium hydroxide both conduct electricity; distilled water does not. As barium hydroxide solution is added to sulfuric acid, conductivity decreases until it reaches zero at the equivalence point. As excess barium hydroxide is added, the conductivity gradually increases.
Acids / Bases |
Conductivity |
Titration / Volumetric Analysis
|
Quantitative Acid-Base Titration
An acid-base titration is demonstrated along with variations in technique for handling stopcocks.
Quantitative Analysis |
Titration / Volumetric Analysis |
Acids / Bases
|
Acid-Base Titrations and Animation
Videos in this group show titrations of various acids with sodium hydroxide as well as molecular reactions during titration.
Acids / Bases |
Aqueous Solution Chemistry |
Titration / Volumetric Analysis
|
Relative Reactivity: Strong Acid, Weak Acid, Buffer Solution
A strong acid, a weak acid, and a buffer solution are each added to sodium bicarbonate and the reaction rates are compared.
Acids / Bases |
Kinetics |
pH
|
Acid Base Reactions
Simple experiments show the titration of acids with sodium hydroxide and the generation of acid from carbon dioxide in water.
Acids / Bases |
Aqueous Solution Chemistry |
Reactions |
pH
|
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 Techniques
Techniques and concepts important in titrations are demonstrated and discussed.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
|
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 |
Titration / Volumetric Analysis
|
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 |
Titration / Volumetric Analysis
|
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 |
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
|
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 |
Titration / Volumetric Analysis
|
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 |
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
|
Variations in Technique for Handling Stopcocks
Three techniques for using stopcocks including right and left hand control are demonstrated.
Laboratory Equipment / Apparatus |
Titration / Volumetric Analysis
|
Ammonia Fountains
An ammonia fountain is demonstrated.
Acids / Bases |
Aqueous Solution Chemistry |
pH |
Precipitation / Solubility
|
pH of Acetic Acid Derivatives
The pH of acetic acid, monochloro-, dichloro-, trichloro-, and trifluoroacetic acids are compared.
Acids / Bases |
Carboxylic Acids |
pH |
Physical Properties |
Molecular Properties / Structure
|
Ammonia Fountains - Multiple
System of multiple ammonia fountains are set up and run. A separatory funnel, four round-bottomed flasks, and some tubing form a closed system. One end of the tubing is immersed in an acetic acid solution that contains universal indicator. The glassware has been filled with ammonia gas. The stopcock of the funnel is closed.
Acids / Bases |
Aqueous Solution Chemistry |
pH |
Precipitation / Solubility
|
Redox Titration and Animation
Videos in this group show a redox titration and the molecular changes during the titration.
Aqueous Solution Chemistry |
Oxidation / Reduction |
Titration / Volumetric Analysis
|
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.
Applications of Chemistry |
Laboratory Equipment / Apparatus |
Quantitative Analysis |
Titration / Volumetric Analysis
|
Volumetric Pipet
A volumetric pipet is used to transfer liquid samples of a known volume.
Laboratory Equipment / Apparatus |
Applications of Chemistry |
Quantitative Analysis |
Titration / Volumetric Analysis
|
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
|
Titration
A large number of movies and images dealing with titration procedures and techniques are presented.
Laboratory Equipment / Apparatus |
Quantitative Analysis |
Titration / Volumetric Analysis
|
Electrolysis
Various examples of electrolysis are presented.
Aqueous Solution Chemistry |
Electrochemistry |
Oxidation / Reduction |
Water / Water Chemistry |
Acids / Bases |
pH |
Conductivity
|
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
|
Denaturation of Protein by Strong Acid John W. Moore, Jerrold J. Jacobsen, Gary Trammell, Kristin Johnson
"Strong acid denatures egg white proteins.This video contains voiceover:""The tertiary structure of egg white proteins is held together by hydrogen bonding and hydrophobic interactions. Adding strong acid to the protein disrupts the intermolecular forces, and the tertiary structure is lost. The loss in protein structure is called denaturation. The proteins precipitate, forming a white solid."""
Acids / Bases |
Proteins / Peptides
|
Extraction of Acid with Base
Water and diethyl ether are shaken in a separatory funnel with a small amount of red indophenol. The non-ionic indophenol remains in the ether layer, coloring it red. Addition of sodium hydroxide converts the indophenol to its blue ionic acid anion which is extracted into the water layer turning it blue.
Acids / Bases |
Precipitation / Solubility
|
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
|
Reactions of Sulfurous Acid
These demonstrations illustrate the production and effects of sulfur dioxide, a pollutant generated by the burning of sulfur impurities in coal. The sulfurous acid produced by dissolving sulfur dioxide in water is allowed to react with various forms of calcium carbonate found in nature, namely marble, limestone, chalk, and eggshell.
Acids / Bases |
Precipitation / Solubility |
Reactions
|
Reactions of Nitric Acid
These demonstrations illustrate the production of nitric acid and its reaction with various forms of calcium carbonate found in nature, namely marble, limestone, chalk, and eggshell.
Acids / Bases |
Precipitation / Solubility |
Reactions
|
Reaction: Sodium with Acids
Reaction of sodium with acid.
Acids / Bases |
Descriptive Chemistry |
Oxidation / Reduction |
Reactions
|
Reactions: Nonmetals with Base
Nonmetallic elements are shown reacting with bases.
Acids / Bases |
Descriptive Chemistry |
Oxidation / Reduction |
Reactions
|
Reactions: Nonmetals with Acids
Nonmetallic elements are shown reacting with acids.
Acids / Bases |
Descriptive Chemistry |
Oxidation / Reduction |
Reactions
|
Reactions: Alkali Metals with Acids
Alkali metals are shown reacting with acids.
Acids / Bases |
Descriptive Chemistry |
Oxidation / Reduction |
Reactions
|
Reactions: Alkali Metals with Base
Alkali Metals are shown reacting with base.
Acids / Bases |
Descriptive Chemistry |
Oxidation / Reduction |
Reactions
|
Reactions: Alkaline Earth Metals with Acids
Alkali earth metals are shown reacting with acids.
Acids / Bases |
Descriptive Chemistry |
Oxidation / Reduction |
Reactions
|
Reactions with Sodium
Reactions involving sodium are demonstrated.
Oxidation / Reduction |
Reactions |
Acids / Bases |
Descriptive Chemistry
|
Formation of Carbon from Carbohydrate
Sulfuric acid has a very high affinity for water. It is shown to dehydrate a carbohydrate (sucrose) forming carbon. Sulfuric acid is reduced to sulfur dioxide, which bleaches a rose petal.
In a second experiment, the sulfur dioxide reduces purple permanganate to nearly colorless manganese(II).
Acids / Bases |
Carbohydrates |
Oxidation / Reduction |
Reactions
|
Reactions: Alkali Metals with Water
Alkali Metals are shown reacting in water.
Descriptive Chemistry |
Oxidation / Reduction |
Reactions |
Water / Water Chemistry |
Acids / Bases
|
Conductivity of Aqueous Acids, Bases, and Salts
The conductivity of carboxylic acid solutions is tested with a conductivity apparatus.
Acids / Bases |
Carboxylic Acids |
Physical Properties |
Water / Water Chemistry
|
Acid Base Reactions of Sulfur Dioxide
Acid base reactions involving sulfur dioxide are shown.
Acids / Bases |
Gases |
Reactions |
Oxidation / Reduction |
Precipitation / Solubility |
Descriptive Chemistry |
Applications of Chemistry
|
Reactions of Sulfuric Acid
Reactions of materials reacting with sulfuric acid are shown.
Acids / Bases |
Oxidation / Reduction |
Reactions |
Descriptive Chemistry |
Aqueous Solution Chemistry |
Precipitation / Solubility
|
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
|
