Question

Question 39
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.

Answer 1

(a) No, the two solutions do not have the same concentration.
(b) Mass percentage = $\frac{Massofsolute}{Totalmassofsolution}\times 100$

Solution prepared by Ramesh is:

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

Solution made by Sarika is:

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

Hence, the solution prepared by Sarika has a higher mass % than that prepared by Ramesh.