# A solution weighing 250 g contains sodium sulfate weighing 50 g. Determine the mass fraction of salt in the solution.

August 22, 2021 | education

| Mass fraction is the ratio of the mass of the solute to the total mass of the solution. It is expressed as a percentage of the total mass of the solution: w = (m / M) * 100, where w is the mass fraction (%), m is the mass of the solute (g), M is the total mass of the solution (g).

In our case, we have a salt mass of 50 – g. The total mass of the solution = 250 g. Hence, taking into account the above: w = (50/250) * 100 = 20%.

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