200 ml of water was added to 100 grams of a 10% copper sulfate solution.

200 ml of water was added to 100 grams of a 10% copper sulfate solution. Calculate the mass fraction of copper sulfate in the resulting solution. The density of water is assumed to be 1 g / ml.

Copper sulfate – CuSO4.
Water – H2O.
Algorithm for solving the problem:
1) Calculation of the solute of copper sulfate in its solution.
2) Calculation of the molar mass of copper sulfate.
3) Calculation of the amount of copper sulfate substance.
4) Calculation of the mass of the water solution.
5) Calculation of the mass of the solution after adding water to the original solution.
6) Calculation of the mass fraction of sulfate in the resulting solution.
Decision:
1) 100 * 10/100 = 10g.
2) 64 + 32 + 16 * 4 = 160.
3) 10/160 = 0.0625 mol.
4) 200 * 1 = 200g.
5) 100 + 200 = 300g.
6) 10/300 * 100 = 3.3% – the answer.