To make a saturated solution, 25 grams of sodium chloride is dissolved in 100 grams of water at 293K. Calculate the concentration (mass by mass percentage) at this temperature.

22.5

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Solution

The correct option is C 20
Mass of solute = 25 grams.
Mass of the solvent = 100 grams.
Mass of solution = 25 + 100 = 125 grams.

Concentration (mass by mass percentage)= $\frac{m a s s o f s o l u t e}{m a s s o f s o l u t i o n} \times 100$ = $\frac{25}{125} \times 100$
= 20 %.

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To make a saturated solution, 25 grams of sodium chloride is dissolved in 100 grams of water at 293K. Calculate the concentration (mass by mass percentage) at this temperature.

The correct option is C 20Mass of solute = 25 grams. Mass of the solvent = 100 grams. Mass of solution = 25 + 100 = 125 grams. Concentration (mass by mass percentage)= mass of solutemass of solution×100 = 25 125×100 = 20 %.

The correct option is C 20
Mass of solute = 25 grams.
Mass of the solvent = 100 grams.
Mass of solution = 25 + 100 = 125 grams.

Concentration (mass by mass percentage)= $\frac{m a s s o f s o l u t e}{m a s s o f s o l u t i o n} \times 100$ = $\frac{25}{125} \times 100$
= 20 %.