During an experiment, the students were asked to prepare a 10% (Mass/Mass) 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.

By Ritesh|Updated : November 14th, 2022

(a) Are the two solutions of the same concentration

(b) Compare the mass % of the two solutions.

Solution:

(a) The two solutions are of the same concentration

(b) The mass % in the case of Sarika is higher than in Ramesh.

examining both solutions:

Let us first consider Ramesh's solution:

To Ramesh,

  • The mass of solute(sugar) = 10g
  • The mass of solvent(water) = 100g

We know that:

Mass of solution = mass of solute + mass of solvent

Substituting the values we get:

So, Mass of solution = 10 + 100 = 110g

We know that:

Mass % = mass of solute/ mass of solution x 100

Substituting the values we get:

Mass % = 10/110 x 100 = 9.09%

Now consider Sarika's solution:

For Sarika,

  • The mass of Solute(sugar) = 10g
  • The mass of the solution = 100g

We know that:

So, the mass of solvent in the case of Sarika = 100 - 10 = 90g

We know that:

Mass % = mass of solute/ mass of solution x 100

Substituting the values we get:

Mass % = 10/100 x 100 = 10%

Part (a): determining whether the concentrations of the two solutions are equal:

Ramesh's solution has a concentration of 9.09%.

10% is how concentrated Sarika's solution is.

As a result, the concentration is different in both circumstances.

Part (b): Compare the mass %

Ramesh's solution has a mass percentage of 9.09%.

Sarika's solution has a mass percentage of 10%.

Because of this, Sarika's mass% is higher than Ramesh's.

Summary:

During an experiment, the students were asked to prepare a 10% (Mass/Mass) 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.

(a) The two solutions are of the same concentration

(b) The mass % in the case of Sarika is higher than in Ramesh.

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