Which substance is formed when carbon dioxide is passed... – Chemistry

Chemistrymedium · Past Paper

Which substance is formed when carbon dioxide is passed through lime water for a long time?

ACalcium carbonate

BCalcium hydroxide

CCalcium bicarbonate

DCalcium oxide

✓ Correct Answer: C — Calcium bicarbonate

Excess CO2 dissolves the initial precipitate of calcium carbonate to form soluble calcium bicarbonate [Ca(HCO3)2].

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