Question

Sodium carbonate softens permanent hard water.

• A. True
• B. False

Answer 1

The correct option is A True

Sodium carbonate, $N{a}_{2}C{O}_3$ is also known as washing soda. It can remove temporary and permanent hardness from water. It is soluble in water and adds a large amount of carbonate ions to the water. These react with dissolved calcium and magnesium ions in the water to produce insoluble precipitates.

Hence, it is a true statement.