Question

Statement-1 : Calgon is used for removing permanent
hardness of water.
Statement-2 : Calgon forms precipitates with Ca²⁺ and Mg²⁺.

Answer 1

Answer:

Calgon is used for removing permanent hardness

Explanation:

Na2P6O18-(Sodiumhexametaphosphate) are commercially known as 'Calgon'

Na2P6O18-(Sodiumhexametaphosphate) are commercially known as 'Calgon'

Na2P6O18-(Sodiumhexametaphosphate) are commercially known as 'Calgon' In this method first It dissolves itself to form complex ions by removing two sodium ions , after this the complex ions devta with Ca and Mg ions to form another ion.

Na2P6O18-(Sodiumhexametaphosphate) are commercially known as 'Calgon' In this method first It dissolves itself to form complex ions by removing two sodium ions , after this the complex ions devta with Ca and Mg ions to form another ion.The complex anion keeps the Mg2+ and Ca2+ ions in the soln. The complex salt thus formed remains dissolved in water .They don't harden because the ions which cause hardness I.e. Ca and Mg ions are not free they have been trapped by Calgon.