Question

write a balanced chemical equation for the removal of
1.permanent hardness​

Answer 1

Hi buddy

Here is your answer

Permanent hardness present in the water can be removed by treating it with soda water and using permutit process. Soluble salts of calcium and magnesium change into insoluble salts due to the treatment with sodium carbonate (washing soda)

Answer 2

$CaCl_2+Na_2CO_3\rightarrow 2NaCl+CaCO_3(s)$

Explanation:

Permanent hardness is the hardness caused by chlorides and sulfates of calcium and magnesium. It is also called as no carbonate hardness as it only be removed using chemical methods.

Lime $Ca(OH))_2$ and soda $a_2CO_3$ are used to remove permanent hardness.

Example: $CaCl_2$ and $MgCl_2$

Equation of removal of permanent hardness​

$CaCl_2+Na_2CO_3\rightarrow 2NaCl+CaCO_3(s)$

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