Question

give reason
soap forms a precipitate in hard water​

Answer 1

Explanation:

When hard water and soap are mixed, the magnesium ion reacts with soap molecules and forms a solid material called a precipitate, which does not dissolve. This precipitate (soap scum) reduces the ability of the soap to make bubbles.

Answer 2

Answer:

Soap does not work properly in hard water. This is primarily because hard water contains salts of calcium and magnesium. When soap is added to hard water, it reacts with these salts to form an insoluble precipitate called scum. This scum sticks to the cloth and decreases the cleansing ability of the soap.