A sample of water contains sodium chlorde. It is

A sample of sodium carbonate contains sodium also. 1.5 g of the sample is dissolved in water and volume raised to 250 mL. 25 mL of this solution requires 20 mL of (N)/(10)H_(2)SO_(4) solution for neutralisation. Calculate the percentage of sodium carbonate in the sample.

How will you purify a sample of benzoic acid containing sodium chloride as impurity ?

A sample of water contained 30ppm of MgSO_4 . Its hardness is

A sample of water containing KCL does not behave as hard water, but a sample of water containing CaC l_(2) behaves as hard water-why?

A sample of water containing KCL does not behave as hard water, but a sample of water containing CaC l_(2) and MgCl_(2) behaves as hard water - why ?

A sample of pond water contains 40mg of organic matter requires 32mg of dissolved oxygen. If pond water contains 100mg of organic matter per two litres, BOD value of the water sample is.

A sample of pond water contains 40mg of organic matter requires 32 mg of dissolved oxygen.if pond water contains 1100mg of organic matter per two litres, calculate BOD value of the water sample.

A sample of hard water contains 0.005 moles of calcium chloride per litre.What is the minimum concentration of sodium sulphate which must be added for removing the Ca^(2+) ions from this water sample ? K_(sp) " of " CaSO_4= 2.4 xx 10^(-5)