Engineering
Chemistry
Hardness of Water and calculation
Hardness of Water
Question

The temporary hardness of a water sample is due to compound X. Boiling this sample converts X to compound Y. X and Y, respectively, are :

Ca(HCO3)2 and Ca(OH)2

Mg(HCO3)2 and Mg(OH)2

Mg(HCO3)2 and MgCO3

Ca(HO3)2 and CaO

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Solution

Mg(HCO3)2→ΔMg(OH)2+CO2+H2O