Advertisements
Advertisements
प्रश्न
Explain the permutit method for softening hard water.
उत्तर
Permutit is an artificial zeolite. Chemically, it is hydrated sodium aluminium orthosilicate with the formula Na2Al2Si2O8.XH2O. For the sake of convenience, let us give it the formula Na2P.
A tall cylinder is loosely filled with lumps of permutit. When hard water containing calcium and magnesium ions percolates through these lumps, ions exchange. Sodium permutit is slowly changed into calcium and magnesium permutit, and the water becomes soft with the removal of calcium and magnesium ions.
When no longer active, permutit is regenerated by running a concentrated solution of brine over it and removing calcium chloride formed by repeated washing.
\[\ce{CaP + 2NaCl -> Na2P + CaCl2}\]
APPEARS IN
संबंधित प्रश्न
Suggest one method for the removal along with the reaction for permanent hardness of water.
Boiling removes the ................ hardness of water.
Temporary hardness of water can be removed by
What are the advantages of soft water.
State the disadvantages of using hard water.
Using given sample of temporary and permanent hard water, soft water, ordinary soap, detergent and washing soda how would you prove the advantage of detergent over soap.
State the causes of hardness in water.
Give two natural sources of hard water.
What is the reason for the hardness of water?
Temporary hardness of water can be removed by
