sblock Elements - Result Question 28

####38. The temporary hardness of water is due to calcium bicarbonate can be removed by adding

(a) $CaCO _3$

(b) $Ca(OH) _2$

(c) $CaCl _2$

(d) $HCl$

$(1979,1 M)$

Objective Questions II

(One or more than one correct option)

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Solution:

  1. Lime treatment remove bicarbonate hardness by forming insoluble $CaCO _3$ as

$Ca\left(HCO _3\right) _2+Ca(OH) _2 \longrightarrow 2 CaCO _3 \downarrow+2 H _2 O$



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