∙ The hardness due to the presence of chloride and sulphate salts of calcium and magnesium is known as the permanent hardness of the water. [1 Mark]
∙ The hardness of water can be removed by adding Washing Soda. [1 Mark]
How can the permanent hardness of water be removed? Give proper chemical equation in support of your answer.
What is the permanent hardness of water? How can it be removed?
How can the permanent hardness of water be removed?