To 250 g of sodium chloride solution with a mass fraction of 15%, another 50 g of salt was added.

| June 16, 2021 | education

To 250 g of sodium chloride solution with a mass fraction of 15%, another 50 g of salt was added. what was its mass fraction in the solution?

Table salt has the formula NaCl.
1) Calculate the mass of the solute salt in its solution. To do this, we multiply the mass fraction of salt by the mass of the solution and divide by one hundred percent: 250 * 15/100 = 37.5 g.
2) Find the mass of the solution after adding salt: 250 + 50 = 300g.
3) Find the mass of the solute in the solution after adding salt: 37.5 + 50 = 87.5g.
4) Calculate the mass fraction of the substance in the resulting solution. For this, the mass of the solute of the resulting solution is divided by the mass of the entire solution and multiplied by one hundred percent: 87.5 / 300 * 100 = 29.2% – the answer.



One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.