What causes the temporary and 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.

What are cation exchange resins? What is their role in removing permanent hardness of water?

How is sodium hexametaphosphate useful in removing the permanent hardness of water?

Show by equations, how both temporary and permanent hard water react with soap.

What is permuitit? How is it useful in removing permanent hardness of water?

Permanent hardness of water can be removed only by chemical methods. Write the name of any one salt responsible for the permanent hardness of water.

Write the name and formula of four minerals which cause permanent hardness of water.