Question

Hard water gets softened on mixing with a solutions of washing soda.

Answer 1

Answer:

Hard water can be softened by adding washing soda (sodium carbonate) which removes the calcium ions in a precipitation reaction. Alternatively, thehard water can be passed through an ion-exchange resin in a column. Sodium ions replace the calcium ions in the water as it passes through the column.

Answer 2

Answer:

Answer: Hard water can be softened by adding washing soda (sodium carbonate) which removes the calcium ions in a precipitation reaction.