Question

Would yoube able to check if water is hard by using a detergent?

Answer 1

Detergentsare ammonium or sulphonate salts of long chain carboxylic acids.Unlike soap, they do not react with calcium and magnesium ionspresent in hard water to form scum. They give a good amount of latherirrespective of whether the water is hard or soft. This means thatdetergents can be used in both soft and hard water. Therefore, itcannot be used to check whether the water is hard or not.