Advertisements
Advertisements
Question
Distinguish between temporary and permanent hardness of water.
Solution
| TEMPORARYOR ALKALiNE HARDNESS. | PERMANET OR NON-ALKALINE HARDNESS. |
|
1.Caused by the process of dissolved bicarbonates of calcium, magnesium and other heavy metals and the carbonates of iron. salts responsible for temporary |
1.It is due to presence of dissolved chlorides and sulphates of calcium, magnesium, iron and other heavy metals. |
| 2. Temporary Hardness can be removed by boiling water. | 2 Permanent Hardness can not be removed by boiling the water. |
| 3. Temporary hardness is called as carbonates or alkaline hardness. | 3.It is also known as non-carbonates or non-alkaline hardness. |
|
4.Boifing: Ca(HCO3)2→CaCO3 + CO2 + H2O. Mg(HCO3)2→Mg(OH)2+ 2CO2 |
4.Can be removed by using chemical and not by boifing CaCl2 + Na2 CO3 → CaCO3 + 2NaCl. |
APPEARS IN
RELATED QUESTIONS
Distinguish between alkaline and non alkaline hardness?
Calculate the total hardness in ppm in given water sample.
: 50ml of standard hard water , containing 1mg pure CaCO3 per ml consumed 20ml EDTA solution.
: 50ml of water sample consumed 30ml EDTA solution using EBT indicator.
Ten thousand litres of hard water was made soft with zeolite. The exhausted zeolite required a total amount of 8 lit of NaCl solution containing 150 gm per litre for regeneration. Calculate the hardness of water.
15000 litres of hard water was passed through a zeolite softener. The exhausted zeolite required 120 litres of NaCI having stream of 30g/l of NaCL Calculate the hardness of water.
Write a note on Ultrafiltration method for purification of water.
A zeolite softener was completely exhausted and was generated by passing 1000 litres of NaCl .How many litres of a sample of hardness 500 ppm can be softened by this softener ?
