define soft water and disadvantage of hard water and mention one method to remove permanent hardness of water.
what are the value possessed by office bearer of green park association?...
Answers
Answered by
4
MPORARY HARD WATER
www.citycollegiate.com
"Water that contains bicarbonate of calcium and magnesium or of both is called temporary hard water."
These bicarbonate are soluble in water and produce corresponding ions.
Mg(HCO3)2 è Mg+2 +2HCO3-1
Ca(HCO3)2 è Ca+2 + 2HCO3-1
PERMANENT HARD WATER
Water that contains chlorides or sulphates of calcium or magnesium or of both is called Permanent water.
CaCl2è Ca+2 + 2Cl-1
MgSO4 è Mg+2 + SO4-2
These compounds are soluble in water and produce corresponding ions.
REMOVAL OF HARDNESS OF WATER
Hardness of water can be removed by the following two methods:
CLARK'S METHOD
www.citycollegiate.com
In Clark’s method a calculated amount of calcium hydroxide Ca (OH)2 is added to hard water. Due to reaction, insoluble carbonates are obtained which are separated by filtration.
Ca(HCO3)2 + Ca(OH)2 è 2CaCO3 + 2H2O
Mg(HCO3)2 + Ca(OH)2 è CaCO3 + MgCO3 + 2H2O
ION-EXCHANGE METHOD
In this method sodium zeolite is used as ion-exchanger. Na-zeolite is passed through the pipes containing hard water. Sodium zeolite is converted into calcium-zeolite or magnesium-zeolite. These are insoluble in water and are separated from water by filtration.
Ca+2 + Na2+ 2Na+1
Mg+2 +Na2-zeolite è Mg-zeolite + 2Na+1
DISADVANTAGE OF HARD WATER
www.citycollegiate.com
Domestic:
Hard water affect cleaning ability of soap.
When hard water is used for washing, large amount of soap is consumed.
Industrial:
Hard water can cause "Scaling" inside the pipes that transport water . Therefore if we use hard water in turbines and heat exchangers, their pipes will be corroded
Health:
Hard water when used for drinking for long period can lead to stomach disorders. Especially hard water contains magnesium sulphate can weaken the stomach permanently.
www.citycollegiate.com
"Water that contains bicarbonate of calcium and magnesium or of both is called temporary hard water."
These bicarbonate are soluble in water and produce corresponding ions.
Mg(HCO3)2 è Mg+2 +2HCO3-1
Ca(HCO3)2 è Ca+2 + 2HCO3-1
PERMANENT HARD WATER
Water that contains chlorides or sulphates of calcium or magnesium or of both is called Permanent water.
CaCl2è Ca+2 + 2Cl-1
MgSO4 è Mg+2 + SO4-2
These compounds are soluble in water and produce corresponding ions.
REMOVAL OF HARDNESS OF WATER
Hardness of water can be removed by the following two methods:
CLARK'S METHOD
www.citycollegiate.com
In Clark’s method a calculated amount of calcium hydroxide Ca (OH)2 is added to hard water. Due to reaction, insoluble carbonates are obtained which are separated by filtration.
Ca(HCO3)2 + Ca(OH)2 è 2CaCO3 + 2H2O
Mg(HCO3)2 + Ca(OH)2 è CaCO3 + MgCO3 + 2H2O
ION-EXCHANGE METHOD
In this method sodium zeolite is used as ion-exchanger. Na-zeolite is passed through the pipes containing hard water. Sodium zeolite is converted into calcium-zeolite or magnesium-zeolite. These are insoluble in water and are separated from water by filtration.
Ca+2 + Na2+ 2Na+1
Mg+2 +Na2-zeolite è Mg-zeolite + 2Na+1
DISADVANTAGE OF HARD WATER
www.citycollegiate.com
Domestic:
Hard water affect cleaning ability of soap.
When hard water is used for washing, large amount of soap is consumed.
Industrial:
Hard water can cause "Scaling" inside the pipes that transport water . Therefore if we use hard water in turbines and heat exchangers, their pipes will be corroded
Health:
Hard water when used for drinking for long period can lead to stomach disorders. Especially hard water contains magnesium sulphate can weaken the stomach permanently.
nidhi158:
thank you verymuch
Answered by
4
SOFT WATER ARE USED FOR WASHING
HARD WATER IS USED FOR BATHING
PERMENENT HARDNESS CAN BE REMOVED BY ADDING WASHING SODA
HARD WATER IS USED FOR BATHING
PERMENENT HARDNESS CAN BE REMOVED BY ADDING WASHING SODA
Similar questions