What causes the temporary and permanent hardness of water?

(a) How does H_(2)O behave as a bleaching agent? (b) What causes temporary and permanent hardness of water?

What do you understand by the temporary hardness and permanent hardness of water ?

What causes permanent hardness of water ?

Name one compound in each case which can cause temporary hardness and permanent hardness in water.

Distinguish between : Temporary and permanent hardness of water.

Name a process which can remove both temporary and permanent hardness of the water.

Give reasons for the following: Washing soda can be used to remove both temporary and permanent hardness in water.