Hard water does not contain `:-`

A sample of hard water is found to contain 50mg of CaSO_4 in 12kg of sample.Calculate the hardness of the sample in terms of ppm of CaSO_4 .

Hard water contains :

Hard water does not give ready leather with soap. What is the reason for hardness?

Hard water does not give ready leather with soap. Suggest one method to remove hardness.

Hard water does not give ready leather with soap. What are the two types of hardness?

Hard water does not produce lather with soap. True/False