Question

during clark's method in which compound mg is precipitated out
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Answer 1

Answer:

Calcium hardness is precipitated as calcium carbonate (CaCO3). Magnesium hardness is precipitated as magnesium hydroxide (Mg(OH)2). These precipitates are then removed by conventional processes of coagulation/flocculation, sedimentation, and filtration.

Explanation:

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Answer 2

The term "hard water" refers to water with a high mineral concentration.

Soft water is characterized as surface water with low ion concentrations, particularly calcium and magnesium ions.

There are several methods for removing hardness from water. Hard water is softened with $Ca(OH)2$ in Clark's water softening process (slaked lime). Clark's reagent is calcium hydroxide. It converts bicarbonates to carbonate to eliminate hardness from water. Clarke's technique employs calcium hydroxide to soften water (lime). It softens the skin for a while.

Reaction

$Ca(HCO3​)2​ + Ca(OH)2\Rightarrow CaCO3+ 2H2O.$

This method involves the addition of slaked lime to water either in solid or in liquid form. This results in the conversion of soluble bicarbonates to insoluble carbonates.

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