Determine the mass concentration in a new solution, which will be obtained by adding 200 g

Determine the mass concentration in a new solution, which will be obtained by adding 200 g of water to a solution with a mass of 500 g and a concentration of 20%

1. Determine the mass of the substance in the original solution:

m (substance) = w1 (substance) * m1 (solution);

m (substance) = 0.2 * 500 = 100 g;

2. find the mass of the diluted solution:

m2 (solution) = m1 (solution) + m (H2O);

m2 (solution) = 500 + 200 = 700 g;

3.Calculate the mass concentration in the new solution:

w2 (substance) = m (substance): m2 (solution);

w2 (substances) = 100: 700 = 0.1429 or 14.29%.

Answer: 14.29%.