You want to test for hardness of water but hard water is not available in the laboratory. Which of t

Question

You want to test for hardness of water but hard water is not available in the laboratory. Which of the following compounds may be dissolved in pure water to make it hard?\ (i) Hydrogen carbonate of sodium\ (ii) Sulphate of magnesium\ (iii) Chloride of calcium\ (iv) Carbonate of sodium\

Professor PC Thomas Classes · Answer

(b) : Hard water can be prepared by dissolving hydrogen carbonates/sulphates/chlorides of calcium and magnesium in pure water.\