Question

different between soft water and hard water?

Answer 1

Hard water... is water that contains an appreciable quantity of dissolved minerals (like calcium and magnesium). Soft water... is treated water in which the only ion is sodium. As rainwater falls, it is naturally soft. ... On the other hand, soft water tastes salty and is sometimes not suitable for drinking.

Answer 2

water in which soap does not lather well is called hard water.
water in which soap lathers well is called soft water