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Watch Investigations in Chemistry Experiments and Observations online: Episode 6 Acids, Bases and Neutralization

In the first lesson, five aqueous solutions are tested for degrees of acidity and alkalinity. The nature of acids and bases is examined. In lesson two, table salt is produced by mixing small pieces of aluminum with solutions of hydrochloric acid and sodium hydroxide. Current flow in acid, neutral, and alkaline solutions is demonstrated. An experiment using ammonia water and dry ice tests varying degrees of acidity. An on-site visit to a neutralization plant in Japan shows how acid levels are reduced by putting quantities of limestone into the Yukawa River. A third lesson demonstrates precautions that should be taken when performing experiments involving heat. Investigations that use chemicals such as chlorine bleach, ether, and metallic sodium, which should not be attempted in a school lab, are also demonstrated.

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