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Chemistry Question on Hydrogen

The products obtained during treatment of hard water using Clark’s method are:

A

CaCO3andMgCO3CaCO_3 and MgCO_3

B

Ca(OH)2andMg(OH)2Ca(OH)_2 and Mg(OH)_2

C

CaCO3andMg(OH)2CaCO_3 and Mg(OH)_2

D

Ca(OH)2andMgCO3Ca(OH)_2 and MgCO_3

Answer

CaCO3andMg(OH)2CaCO_3 and Mg(OH)_2

Explanation

Solution

In Clark's method lime water is used

Ca(HCO3)2+2Ca(OH)2→2CaCO3+2H2OCa(HCO_3)_2+2Ca(OH)_2→2CaCO_3+2H_2O

Mg(HCO3)2+2Ca(OH)2→2CaCO3+Mg(OH)2+2H2OMg{(HCO_3)}_2+2Ca(OH)_2→2CaCO_3+Mg(OH)_2+2H_2O