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Construct a simple wet cell battery. When complete it will generate 1.5 volts for 20-30 minutes. Several cells can be connected in series to increase the voltage or in parallel...
Explain and view chemiluminescence. Observe how luminol is converted to an excited state in the presence of an oxidizer such as hydrogen peroxide. As the excited state molecule decays or...
Explain the principle of high surface tension as water acts like a membrane stretched across the surface preventing the sulfur particles from sinking. A wetting agent lowers the surface tension...
Show an example of polymer chemistry. Make your own nylon which is a synthetic compound of high molecular weight that consists of up to millions of repeated chemical units that...
Show an example of polymer chemistry. Make your own nylon which is a synthetic compound of high molecular weight that consists of up to millions of repeated chemical units that...
TLC is a technique of separation chemistry, which provides a simple, rapid method of separating small amounts of compounds. A mixture of three dyes is prepared and then separated on...
Show how the first synthetic rubber was made in United States by a reaction of sodium polysulfide with ethylene chloride. This produces a simple condensation polymer consisting of repeating units...
Discover the principle of oxidation-reduction. Compounds that change color as a result of a change in their pH or oxidation state are called indicators. Illustrate this principle by mixing potassium...
Study both processes of endothermic and exothermic reactions. Reactions are safely carried out in plastic bags. The students can pass the bags around to feel the results of the reactions.
Study the process of endothermic reactions. The reaction is safely carried out in a plastic bag. The students can pass the bag around to feel the result of the reaction.
Study the process of exothermic reactions. The reaction is safely carried out in a plastic bag. The students can pass the bag around to feel the result of the reaction.
Ampholytes are compounds which react with both acids and bases. When zinc chloride is reacted with sodium hydroxide the soluble zincate ion is formed. When zinc hydroxide is reacted with...
Catalysis is a basic principle of chemistry and biochemistry. Some reactions are autocatylic; the product of the reaction actually catalyzes further reactions. The reaction is initiated with acid and produces...
Demonstrate polymer chemistry. Newsprint is dissolved in a solution of ammonium hydroxide and cupric sulfate. The solution is then added to a sulfuric acid solution and dark strands are formed.