Question

describe cause and types of hard water, heavy water with its uses.

Answer 1

hard water : there are two types of hard water 1 hard water containing calcium and magnesium ions .
2 hard water containing calcium carbonate or magnesium carbonate

hard water is good for drinking as it containing essential minerals like calcium and magnesium which is good for health

heavy water : heavy water is the water with the chemical formula d20 were d stands for dutrium which is an isotope of hydrogen

use of heavy water
it is used in necular reactor for slowing down nuclear reaction .