Question

Определите массу воды, в которой необходимо растворить 50 г калий сульфата для получения раствора с массовой долей вещества 10%?

Answer 1

Обычная пропорция!!!!! Пусть вода это х Тогда: Х=90% 50=10% 50*90:10=450г. Ответ масса воды 450г.

Answer 2

Calculating the Mass of Water

To determine the mass of water required to dissolve 50 g of potassium sulfate and obtain a solution with a mass fraction of 10%, we can use the formula for mass fraction:

Mass Fraction = (mass of solute / total mass of solution) * 100%

We can rearrange this formula to solve for the mass of water:

Mass of Water = (mass of solute) / (desired mass fraction of solute) * (100% - desired mass fraction of solute)

Substituting the given values: - Mass of solute (potassium sulfate) = 50 g - Desired mass fraction of solute = 10%

Mass of Water = (50 g) / (10%) * (100% - 10%)

Calculating: Mass of Water = (50 g) / (0.10) * (0.90) = 500 g

Therefore, the mass of water required to dissolve 50 g of potassium sulfate and obtain a solution with a mass fraction of 10% is 500 grams.