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 Form 1 Chemistry: Acids, bases and indicators online lessons

Meaning and types of acids

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Answer Text:
ACIDS BASES AND INDICATORS.
Acids:
- Are substances that dissolve in water to release hydrogen ions.
- Acids can either be organic acids or mineral acids;
(i). Organic acids:
- Are acids found in plants and animals;
Examples:
- lactic acid in sour milk;
- Citric acid in citrus fruits like oranges;
- Ethanoic acid in vinegar;
- Tartaric acid in baking powder;
- Methanoic acid in bee and ant stings;
- Tannic acid in tea;
(ii). Mineral acids.
- Are acids made from minerals containing elements such as sulphur,chlorine, nitrogen etc.
- Are formed from reactions of chemicals;
- Main examples include:
- Sulphuric (VI) acid (#H_2SO_4#); contains hydrogen, sulphur and oxygen;
- Hydrochloric acid; contains hydrogen and chlorine;
- Nitric (V) acid (#HNO_3#); contains nitrogen, oxygen and hydrogen;
Note:
- Mineral acids are more powerful than organic acids; because they yield // release more hydrogen ions in water
- They are thus more corrosive.


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