Question

Lime wate turn milky when carbon dioxide gas is passed through it and future tense colourless when excess of carbon dioxide is bubbled through it explain why through it explain

Answer 1

When carbon dioxide is passed through lime water for a short time, the solution turns milky. This is due to the formation of calcium carbonate.

ie Ca(OH) 2 + CO2 = CaCO3 + H2O

2) When carbon dioxide is passed through lime water for a longer time, the milkiness disappears because calcium carbonate turns into calcium hydrogen carbonate which is colorless in nature.

CaCO3 + H2O + CO2 = Ca(HCO3) 2

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