Chemistry Tuition Singapore Secondary Science Tuition – Acids and Bases

ACIDS

The common acids found in the laboratory or in fruits/foods are as follows

Strong Acids – Hydrochloric acid
– Sulfuric acid
-Nitric acid

Weak Acids – Citric acid (in citrus fruits such as oranges and lemons)
-Ethanoic acid (in vinegar)
-Malic acid (in apples)

Properties of acids

• All acids, either strong or weak, have the following properties:
• Sour taste
• Able to conduct electricity
• Corrosive if concentrated

-Able to turn blue litmus paper red

-Able to react with metals, carbonate compounds and alkalis

Reaction with metals

The reaction between metals and acids produce salts and hydrogen gas

Reaction with carbonates

Acids react with carbonate compounds to produce salts, carbon dioxide and water

Reaction with alkalis

-Acids react with alkalis to produce salts and water only.

-The reaction between acids and alkalis is called the neutralisation reaction

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