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 10 g 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.

Solution
1. No both the solution have different concentration.
2. In case of Ramesh it is 10 gram of solute in total 110 g solution ( 10 g sugar + 100 g water)
So concentration in mass % = 10 / 110 x 100 = 9.09 %
But in case of Sarika ‚Äčit is 10 gram of solute in total 100 g solution ( 10 g sugar + 90 g water)
So concentration in mass % = 10 / 100 x 100 = 10 %

The solution prepared by Ramesh contains less amount of solute than Sarika.

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