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The term “hard water” refers to water with a high mineral concentration.
Soft water is characterised as surface water with low ion concentrations, particularly calcium and magnesium ions.
There are several methods for removing hardness from water. You may learn more about Clark’s method here.
Clark’s method to remove the hardness of water:
Hard water is softened with CaOH2 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:
CaHCO32+CaOH22CaCO3+2H2O
The addition of slaked lime to water, either in solid or liquid form, is used in this approach. As a result, soluble bicarbonates are converted to insoluble carbonates.
