1.

During an experiment the students were asked to prepare a 10% (mass/mass) solution of sugar in water. Ramesh dissolved 10 g of sugar in 100 g of water while Sarika prepared it by dissolving 10g of sugar in water to make 100 g of the solution. (a)Are the two solutions of the same concentration? (b) Compare the mass % of the two solutions.

Answer»

Solution :(a) No, the two solutions have DIFFERENT concentrations.
(B) Mass % of solution prepared by Ramesh = `("Mass of sugar")/("Mass of solution")xx 100`
`=(10)/((10 + 100)) xx 100 = (10)/(110) xx 100 = 9.09%`
Mass % of solution prepared by Sarika = `("Mass of sugar")/("Mass of solution")xx 100 = (10)/(100) xx 100 = 10.0%`


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