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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When no longer active, permutit is regenerated by running a concentrated solution of brine over it and removing calcium chloride formed by repeated washing.
\[\ce{CaP + 2NaCl -> Na2P + CaCl2}\]
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संबंधित प्रश्न
Name the compound responsible for temporary hardness.
Suggest one method for the removal along with the reaction for temporary hardness.
State the disadvantages of using hard water.
Explain with equation, what is noticed when permanent hard water is treated with Washing soda.
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.
Using given sample of temporary and permanent hard water, soft water, ordinary soap, detergent and washing soda how would you distinguish between hard and soft water?
Fill in the blank:
Hard and soft water can be distinguished using _____.
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 _______.
