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O-LevelChemistryAcids, Bases & Salts5070/11 · May/June 2024 · Q241 Mark

The water in a lake is acidic and the fish are dying. The water in the lake needs to be neutralised so that its pH is close to 7. Which compound is added in excess to neutralise the water in the lake?

Acalcium carbonate
Bphosphoric acid
Cpotassium hydroxide
Dsodium nitrate

✓ Correct answer

A: calcium carbonate

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About this question

Topic
Acids, Bases & Salts, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source
O-Level Chemistry, May/June 2024 Paper 1 Variant 1, question 24.

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