Question

During an Experiment the students were asked to repare 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 solution of the same concentration.

b) compare the mass% of the two solutions.

Answer 1

a) No, both are different.
b) Ramesh- 9.9%
Sarika- 10%

Refer to attachment for working.

Answer 2

Answer:  

a) No, both are different.

b) Ramesh- 9.9%

   Sarika - 10%

Explanation:

According to the solution prepared by Ramesh,

Mass of sugar he took (Solute) = 10 g

Mass of water he took (Solvent) = 100 g

Thus Mass % of the solution = $\frac{\text { mass of solute }}{\text { mass of solution }}$

       $=\frac{10}{110} \times 100=\frac{100}{11}=9.9 \%$

According to the solution prepared by Sarika,

Mass of sugar she took (Solute) = 10 g

Mass of Solution she took  = 100 g

Thus Mass % of the solution = $\frac{\text { mass of solute }}{\text { mass of solution }}$

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