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Videos: 26 results
Electrolysis-Water  
This experiment demonstrates the electrolysis of water.
Electrochemistry |
Water / Water Chemistry
HCl, NaOH, NaCl and Water  
Electrolysis of HCl, NaOH and NaCl solutions and of water is shown.
Aqueous Solution Chemistry |
Electrochemistry |
Oxidation / Reduction |
Water / Water Chemistry
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
Reaction: Potassium with Water  
Demonstrations of potassium reacting in water.
Descriptive Chemistry |
Water / Water Chemistry
Reactions: Acetylene  
Preparation of acetylene and the reaction of chlorine with acetylene are demonstrated. An antique carbide lamp is also demonstrated.
Alkynes |
Reactions |
Water / Water Chemistry |
Oxidation / Reduction
Reactions involving Acetylene  
Some movies relating to acetylene are presented.
Alkynes |
Reactions |
Water / Water Chemistry |
Applications of Chemistry
Exploding Hydrogen Balloons  
Explosions of hydrogen-filled balloons are demonstrated.
Descriptive Chemistry |
Spectroscopy |
Water / Water Chemistry
Electrostatic Attraction-Liquids  
Liquids are brought near a charged rod to check for attraction.
Covalent Bonding |
Noncovalent Interactions |
Water / Water Chemistry
Reactions: Nonmetals with Water  
Nonmetallic elements are shown reacting with water.
Descriptive Chemistry |
Oxidation / Reduction |
Reactions |
Water / Water Chemistry
Reactions: Alkaline Earth Metals with Water  
Alkali earth metals are shown reacting in water.
Descriptive Chemistry |
Oxidation / Reduction |
Reactions |
Water / Water Chemistry
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
Steam and Superheated Steam  
Water is boiled and the steam is collected and run through a coil of copper tubing. 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.
Applications of Chemistry |
Gases |
Phases / Phase Transitions / Diagrams |
Water / Water Chemistry
Hydrophobic Effect  
Hydrophobic Effect: Octanoic acid forms a monolayer on the surface of water under certain conditions.
Alkanes / Cycloalkanes |
Carboxylic Acids |
Molecular Properties / Structure |
Water / Water Chemistry |
Noncovalent Interactions
Isotopes: Heavy Water Ice Cubes  
An H2O ice cube is shown to float in a beaker of liquid water, while an ice cube of D2O (heavy water) is shown to sink in liquid water.
Hydrogen Bonding |
Isotopes |
Physical Properties |
Atomic Properties / Structure |
Water / Water 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
Electrochemistry  
Reactions exploring electrochemical concepts.
Electrochemistry
Electrolysis of Aqueous Solutions -- Original  

Electrolysis of several aqueous solutions is carried out using a 9-V battery and pencil leads as electrodes. Because only the electrodes are shown in the videos, it is important to show these still images

 

or describe how the reactions were performed if students are to make sense of the videos. In each case the anode is on the left and a 9-V battery has been connected to the lead of each of the pencils near the eraser end with an alligator clip.

A newer version of most of these reactions using platinum electrodes is available as Electrolysis of Aqueous Solutions -- New.


Aqueous Solution Chemistry |
Electrochemistry
Overvoltage  
Zinc metal reacts with hydrochloric acid, generating hydrogen gas. However, when a strip of nickel, copper, platinum or lead is placed in hydrochloric acid, no reaction is observed.
Descriptive Chemistry |
Electrochemistry
Metal-Iodine Reactions and Cells  
Electrochemical reactions are demonstrated and then used to do work.
Electrochemistry |
Electrolytic / Galvanic Cells / Potentials
Gas Producing  
Electrolysis of solutions with only gas(es) produced is shown.
Aqueous Solution Chemistry |
Electrochemistry |
Oxidation / Reduction
Tin Compounds  
Electrolysis of tin(II) and tin(IV) solutions of different concentrations is shown.
Aqueous Solution Chemistry |
Electrochemistry |
Oxidation / Reduction
Solid Producing  
Electrolysis of solutions in which a solid is produced is shown.
Aqueous Solution Chemistry |
Electrochemistry |
Oxidation / Reduction
Electrolysis of Aqueous Solutions -- New  
This is a revised version of the previously published Electrolysis of Aqueous Solutions, providing corrections and additional images. In order to understand most of these videos it is important to either see the Complete Experiment: Electrolysis of an Aqueous Solution video or to be able to read a description of that video (such as the one in the Discussion section for that video).
Aqueous Solution Chemistry |
Electrochemistry |
Oxidation / Reduction
Electrochemical Series: Metal Trees  
A piece of metal (Cu, Zn, Ag, Cd, or Pb) is placed in an aqueous solution of a metal ion (Cu2+, Zn2+, Ag+, Cd2+, or Pb2+). In some cases the growth of metal crystals indicates that a chemical reaction has occurred.
Aqueous Solution Chemistry |
Oxidation / Reduction |
Electrolytic / Galvanic Cells / Potentials |
Electrochemistry