The method used to remove the temporary hardness of water is:

  • Option 1)

    Calgen's Method

  • Option 2)

    Clark's Method

  • Option 3)

    Ion-exchange method

  • Option 4)

    Synthetic Resins method

Answers (1)

Option 2 Clark's method

This method is used for removing the temporary hardness of water.

    \\ Mg(HCO_3)_2 \overset{\Delta}\longrightarrow Mg(OH)_2\downarrow + 2CO_2 \uparrow \\ Ca(HCO_3)_2 \overset{\Delta}\longrightarrow CaCO_3\downarrow + H_2O + CO_2\uparrow

These precipitates can be removed by Filtration.


Option 1)

Calgen's Method

Option 2)

Clark's Method

Option 3)

Ion-exchange method

Option 4)

Synthetic Resins method

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