Question 1:
Would you be able to check if water is hard by using a detergent?
Answer:
Detergents are ammonium or sulphonate salts of long chain carboxylic acids. Unlike
soap, they do not react with calcium and magnesium ions present in hard water to
form scum. They give a good amount of lather irrespective of whether the water is
hard or means that detergents can be used in both soft and hard water. Therefore,
it cannot be used to check whether the water is hard or not.
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