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प्रश्न
Explain the permutit method for softening hard water.
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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When no longer active, permutit is regenerated by running a concentrated solution of brine over it and removing calcium chloride formed by repeated washing.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
Give two examples of hydrated substances.
Define the Soft water.
Name the compound responsible for temporary hardness.
Suggest one method for the removal along with the reaction for permanent hardness of water.
What do you understand by
Soft water
Differentiate between Hard & soft water with suitable examples.
Give reason for the following:
Hardness in temporary water can be removed by boiling, but hardness in permanent hard water cannot.
Temporary hardness of water can be removed by ________ of water.
What are the methods of removing hardness of water?
Temporary hardness of water can be removed by
