Advertisements
Advertisements
प्रश्न
Explain the permutit method for softening hard water.
Advertisements
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When no longer active, permutit is regenerated by running a concentrated solution of brine over it and removing calcium chloride formed by repeated washing.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
Give two examples of hydrated substances.
What do you observe when Washing soda is exposed to air ?
Define the Hard water.
Temporary hardness of water can be removed by
Differentiate between Temporary & permanent hard water with suitable examples.
Give reason for the following:
Washing soda can be used to remove both temporary and permanent hardness in water.
A sample of water is given in a trough. State how would you prove experimentally whether the given sample is hard water or soft water.
Permanent hardness of water is due to the presence of _______.
What are the methods of removing hardness of water?
What is permanent hardness of water? How can it be removed?
