One litre water has 81 mg of calcium bicarbonate and 95 mg of magnesium chloride dissolved. Find out the temporary, permanent and total hardness of water sample.

100kg of a water sample contains 6g of magnesium sulphate, 10.2g of calcium sulphate and 16.2 g of calcium bicarbonate only. Calculate permanent hardness, temporary hardness and total hardness.

One kilogram of hard water sample contains 5 xx 10^(-4) mol of magnesium bicarbonate only. Calculate the degree of hardness of the water sample.

If 1 kg of water contains 12 mg of magnesium sulphate its degree of hardness is

If 1 kg of water contains 12 mg magnesium sulphate its degree of hardness is

Hardness of a water sample is 150 ppm. Its hardness is due to only calcium bicarbonate, the weight of calcium hydroxide that required to remove hardness of one litre of hard water is

A hard water sample contains calcium chloride only degree of hardness with 200 ppm. Calculate the weight of calcium chloride present in 10 kg of water sample.

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