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O-LevelChemistryAcids, Bases & Salts5070/12 · Oct/Nov 2017 · Q231 Mark

A household cleaning compound is used to remove calcium carbonate from bathroom surfaces. The compound reacts with the calcium carbonate to form a soluble salt, carbon dioxide and water. What is the pH of this cleaning compound?

ApH 2
BpH 7
CpH 10
DpH 14

✓ Correct answer

A: pH 2

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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 2017 Paper 1 Variant 2, question 23.

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