Question

в 80 г 20%-ного раствора хлорида натрия растворили 10 г этой же соли. Рассчитайте массовую долю соли в полученном растворе.​

Answer 1

Calculation of the Mass Fraction of Sodium Chloride in the Solution

To calculate the mass fraction of sodium chloride in the solution, we need to know the initial mass of the 20% sodium chloride solution and the mass of the additional 10 grams of sodium chloride that was dissolved.

Let's assume the initial mass of the 20% sodium chloride solution is M grams.

The mass of sodium chloride in the initial solution can be calculated as follows:

Mass of sodium chloride in the initial solution = 20/100 * M grams .

The additional 10 grams of sodium chloride that was dissolved will contribute to the total mass of the solution.

The total mass of the solution after dissolving the additional 10 grams of sodium chloride can be calculated as follows:

Total mass of the solution = M grams + 10 grams.

To calculate the mass fraction of sodium chloride in the solution, we divide the mass of sodium chloride in the solution by the total mass of the solution:

Mass fraction of sodium chloride = (Mass of sodium chloride in the initial solution + 10 grams) / (Total mass of the solution).

Please provide the value of M (the initial mass of the 20% sodium chloride solution) so that we can calculate the mass fraction of sodium chloride in the solution.