General Knowledge - General Science - Discussion
Discussion Forum : General Science - Elements and Metals (Q.No. 47)
47.
Permanent hardness of water can be removed by adding
Discussion:
19 comments Page 2 of 2.
Abc said:
10 years ago
What is meant by the permanent hardness of water?
Manojit muhuri said:
9 years ago
What is hardness of water please any one can explain?
Nandu said:
8 years ago
@Manojit Muhuri.
The water hardness contains calcium (ca) + magnesium (mg) more than 10 ppm is called slight hard water it can b remove by ion exchange process.
The water hardness contains calcium (ca) + magnesium (mg) more than 10 ppm is called slight hard water it can b remove by ion exchange process.
AJAY SINGH said:
8 years ago
There are a number of methods to remove the hardness present in water. One those methods are being followed, the hard water gets converted to soft water. Some of the methods to remove hardness from water are,
Chemical Process of Boiling Hard Water.
Adding Slaked Lime (Clark's Process).
Adding Washing Soda.
Calgon Process.
Ion Exchange Process.
Using Ion Exchange Resins.
Chemical Process of Boiling Hard Water.
Adding Slaked Lime (Clark's Process).
Adding Washing Soda.
Calgon Process.
Ion Exchange Process.
Using Ion Exchange Resins.
Ajay singh said:
8 years ago
@Manojit.
The amount of dissolved calcium and magnesium in the water is hard water.
The amount of dissolved calcium and magnesium in the water is hard water.
Tenzin said:
1 decade ago
Sodium carbonate (washing soda) form sodium chloride with the chloride of mg and ca which cause permanent hardness and as a result permanent hardness reduces to mg and ca carbonates which are temporary hardness and can be easily removed.
Elue above said:
7 years ago
Ion exchange doesn't remove permanent hardness @Sandy.
Siddharth pandey said:
1 decade ago
But how it can remove the permanent hardness of water ?
Nmatre said:
7 years ago
In one word, the surface tension is extremely high which causes to the hardness of water when we add washing soda it gets weakens and thus cleaning soap or detergent work properly by breaking hardness molecule.
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