Question

During an experiment, the students were asked to prepare a 10% solution of sugar in water. Ramesh dissolved 10g of sugar in 100g of water while Sarika prepared it by dissolving 10g of sugar in water to make 100g of the solution.

Are the two solutions of the same concentration?

Answer 1

No, the two solutions were of different concentrations.

Mass$\%=\frac{massofsolute}{(massofsolute+massofsolvent)}\times 100$

Solution made by Ramesh-

Mass$\%=\frac{10}{(100+10)}100=\frac{10}{110}\times 100=9.09\%$

Solution made by Sarika-

Mass$\%=\frac{10}{100}\times 100=10\%$

$\therefore$ Both have different concentrations.