First slide

Hardness of water

Question

Which of the following ions will cause hardness in water sample?

Easy

A

Ca²⁺
B

Na⁺
C

Br^–
D

K⁺

Solution

Hardness of water is due to presence of HCO₃^-1, Cl^-1, SO₄^-2 and Ca⁺², Mg⁺²

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