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O-LevelChemistryAcids, Bases & Salts5070/12 · Oct/Nov 2015 · Q141 Mark

A solution of sodium carbonate was added to tap water. A white precipitate formed. Which ion present in the tap water caused the precipitate to form?

Achloride
Bmagnesium
Cpotassium
Dsulfate

✓ Correct answer

B: magnesium

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About this question

Topic
Acids, Bases & Salts, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source
O-Level Chemistry, Oct/Nov 2015 Paper 1 Variant 2, question 14.

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