An element with electronic configuration 2, 8, 1 forms acompound with carbonate. How does this compound remove both temporary and permanent hardness of water?

An element with electronic configuration 2, 8, 1 forms acompound with

1.	An element with electronic configuration 2, 8, 1 forms acompound with carbonate. How does this compound remove both temporary and permanent hardness of water?
Answer» Solution :Element with ELECTRONIC configuration 2, 8, 1 is NA and its carbonate is SODIUM carbonate which is called washing soda. It is used for the removal of both temporary and PERMANENT hardness of water. `Ca(HCO_(3))_(2) + Na_(2)CO_(3) rarr CaCO_(3) darr + 2NaHCO_(3)` `CaSO_(4) + Na_(2)CO_(3) rarr CaCO_(3) darr + Na_(2)SO_(4)` `CaCO_(3)` is insoluble and hence settles down. In this way washing soda can be used to remove both temporary and permanent hardness of water.