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Temporary hardness of water can be remov...

Temporary hardness of water can be removed

A

By boiling

B

By freezing

C

By the addition of NaCl

D

By the addition of `Na_(2)SO_(4)`

Text Solution

Verified by Experts

The correct Answer is:
A
Temporary hardness of water can be removed by boiling & clark.s method.
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Temporary hardness of water is removed in Clark's process by adding

Soap is the sodium salt of a long chain fatty acid, Sodium salt stearic acis is soluble in water, whereas calcium and magnesium salts are insoluble, so when soap is added to soft water, it dissolves and forms lather readily. Temporary hardness in water can be easily removed by boiling. Permanent hardness can be removed by the addition of washing soda, Calgon process, ion exchange process. The degree of hardness of a sample of water containing 6 mg of magnesium sulphate (other salts are absent) per kilogram of water is

Soap is the sodium salt of a long chain fatty acid, Sodium salt stearic acis is soluble in water, whereas calcium and magnesium salts are insoluble, so when soap is added to soft water, it dissolves and forms lather readily. Temporary hardness in water can be easily removed by boiling. Permanent hardness can be removed by the addition of washing soda, Calgon process, ion exchange process. Calgon contains

(A) : Temporary hardness can be removed by boiling hard water (R) : On boiling hard water bicarbonates of calcium and magnesium are converted to insoluble carbonates

Temporary hardness of water is due to the presence of of _ _ _ _ _ calcium and magnesium in water.

Temporary hardness is due to

The reagent(s) used for softening the temporary hardness of water are a) Ca_3(PO_4)_2 b) Ca(OH)_2 c) Na_2CO_3 d) NaOCl

Permanent hardness of water is due to

How is hardness of water estimated ?

Both temporary and permanent hardness can be removed by using