" Why do soaps not work in hard water? "

Why soaps do not work in hard water?

Why soaps do not work in hard water ?

Why soaps are not used in hard water?

Both soap and detergent are same type of salts. What is the difference between them ? Describe in brief the cleansing action of soap. Why do soaps not form lather in hard water?

Is it true that soaps do not work well with hard water ?