To 500 ml of a 32% solution of nitric acid, 1 liter of water was added completely to 1.2 g / ml.

To 500 ml of a 32% solution of nitric acid, 1 liter of water was added completely to 1.2 g / ml. What is the mass fraction of nitric acid in the resulting solution?

Nitric acid formula: HNO3.
Water formula: H2O.
1) Calculate the mass of the nitric acid solution. To do this, multiply the volume of acid by its density: 500 * 1.2 = 600g.
2) Find the mass of the nitric acid solute. To do this, multiply the mass of the solution by the mass fraction of the solution and divide by one hundred percent: 600 * 32/100 = 192g.
3) Weight of added water solution: 1000ml * 1g / ml = 1000g.
4) The mass of the solution after adding water: 6000 + 1000 = 1600g.
5) Mass fraction of acid in the resulting solution: 192/1600 * 100 = 12% – answer.