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Q. The metal salts formed during softening of hardwater using Clark's method are :

JEE MainJEE Main 2022Hydrogen

Solution:

Clark's Method Reaction
$Ca \left( HCO _3\right)_2+ Ca ( OH )_2 \rightarrow 2 CaCO _3+2 H _2 O $
$Mg \left( HCO _3\right)_2+2 Ca ( OH )_2 \rightarrow 2 CaCO _3+ Mg ( OH )_2+2 H _2 O$