How many grams of barium chloride should be dissolved in 500 g of water to obtain a 10% solution?

In this solution, 500 grams of water will have a mass fraction of 90%.

Find the mass of the solution by dividing the mass of water by its mass fraction.

m solution = 500 / 0.9 = 555.55 grams;

Find the mass of salt by subtracting the mass of water from the mass of the solution.

m salt = 555.55 – 500 = 55.55 grams;

Checking: 500 + 55.55 = 555.55;