100g of a water samples is found to contain 12 mg of `MgSO_(4)` calculate the hardness of water sample.

A sample of hard water is found to contain 50mg of CaSO_4 in 12kg of sample.Calculate the hardness of the sample in terms of ppm of CaSO_4 .

A water sample contains 1 millimole of Mg^(2+) ion per litre. calculate the hardness of water sample in ppm unit.

Calculate the degree of hardness of a sample of hard water which is found to contain 72 mg of "MgSO"_(4) per kg of water.

A water sample contains 1 millimole of Mg^(2+) ion per litre. Calculate the hardness of the water sample in ppm unit.

100kg of a sample of water contained 6 of MgSO_(4) The degree of

1000g of a water sample contained a calcium salt equivalent to 18 of CaSO_(4) The hardness of that water sample is

500 gms of water contains 6 times 10^(-3) gms of dissolved MgSO_(4) in it. Calculate the hardness of water in ppm of CaCO_(3) ?

1000g of a water sample contained a calcium salt equivalent to 1g of CaCO_3 . The hardness of that water sample is