Determine the mass of sugar that needs to be dissolved in 1 liter of water to obtain a solution

Determine the mass of sugar that needs to be dissolved in 1 liter of water to obtain a solution with a mass fraction of 20% sugar.

1.Let’s find the mass of the solution by the formula:

m = V × p, where p is the density of water, equal to 1 g / cm3.

m = 1 l × 1 g / cm3 = 1000 g.

2.Let’s find the mass of sugar in the solution, if it is known that the mass fraction is 20%, and the mass of the solution is 1000 g.

W = m (substance): m (solution) × 100%,

hence m (substance) = (m (solution) × w): 100%.

m (substance) = (1000 g × 20%): 100% = 200 g

Answer: 200 g of sugar must be dissolved in 1 liter of water.