Question

name the na compound which is used for softening hard water

Answer 1

Sodium carbonate, Na2CO3, is also known as washing soda. It can remove temporary and permanent hardness fromwater. Sodium carbonate is soluble but calcium carbonate and magnesium carbonate are insoluble. The water is softened because it no longer contains dissolved calcium ions and magnesium ions.

Answer 2

Washing soda ( Na2 CO3.10H2O) is hydrated sodium carbonate which is used for softening hard water.