The following methods can not be used to remo | vedclass

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(D) Lime $(Ca(OH)_2)$ is typically used to remove temporary hardness of water,a process known as Clark's method.$Ca(HCO_3)_2 + Ca(OH)_2 \rightarrow 2C

Vedclass · Accepted Answer

Adding calculated amount of lime

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(D) Lime $(Ca(OH)_2)$ is typically used to remove temporary hardness of water,a process known as Clark's method.$Ca(HCO_3)_2 + Ca(OH)_2 \rightarrow 2CaCO_3 \downarrow + 2H_2O$Permanent hardness is caused by the presence of chlorides and sulfates of magnesium and calcium,which cannot be removed by adding lime.

The following methods can not be used to remove permanent hardness of water:

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