(i) What are different methods of expressing concentration ?
(ii)How do you prepare and standardize:- (a)250 ml of 0.1M H2SO4
(b)500 ml of 0.5 N KMnO4
(c)500 ml of 0.1 N HCl
(d)250 ml of 0.1 N NaOH
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Answer:It can be expressed in several ways: molarity (moles of solute per liter of solution); mole fraction, the ratio of the number of moles of solute to the total number of moles of substances present; mass percentage,
the ratio of the mass of the solute to the mass of the solution times 100; parts per thousand (ppt), grams
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