Question

The hard water of a well becomes soft on adding washing soda to it. Give scientific explanation.

Answer 1

Bcz washing soda is made up of sulphides so after adding washing soda in it it becomes soft

Answer 2

Explanation:

Hard water ($D_{2}O$) and Washing soda ($Na_{2}CO_{3}$)

As we know that the hard water contains the calcium and magnesium salts in the form of sulphides. When hard water reacts with washing soda then the calcium and magnesium salts are precipitated and hard water becomes soft.

So, the hard water of a well becomes soft on adding the washing soda to it as salts are precipitated.