Question

By passing excess of co2 into lime water a clear solution of calcium hydrogen carbonate is formed to this clear solution if ammonium hydroxideis added

Answer 1

Explanation:

formation of water soluble calcium bicarbonate

When CO2 is passed through lime water, it turns milky due to the formation of calcium carbonate which is sinsoluble in water.

limewaterCa(OH)2+CO2⟶milkinessCaCO3+H2O

However, when excess of CO2 is passed through this solution, the milkiness disappears. This is due to the formation of calcium bicarbonate which is colorless and soluble in water.

milkinessCaCO3+H2O+excessCO2⟶water solubleCa(HCO3)2

I hope my answer helps you.