Question

Слили два раствора соли: 180 г 15%-ного и 120 г 10%-ного раствора. Найдите массовую долю кислоты в полученном растворе

Answer 1

Масса кислоты в 1 растворе 180×0.15=27 г, во 2 растворе 120×0.10=12 г. след-но, в полученном растворе 27+12=39 г килоты из 300 г. Тогда масс доля этого раствора 39÷300=0,13

Answer 2

Calculation of the Mass Fraction of Acid in the Solution

To find the mass fraction of acid in the resulting solution, we need to calculate the total mass of acid in the two salt solutions and then divide it by the total mass of the resulting solution.

Let's calculate the mass of acid in each solution first:

- For the 15%-concentration solution: - Mass of the solution = 180 g - Concentration of the solution = 15% - Mass of acid in the solution = (15/100) * 180 g = 27 g

- For the 10%-concentration solution: - Mass of the solution = 120 g - Concentration of the solution = 10% - Mass of acid in the solution = (10/100) * 120 g = 12 g

Now, let's calculate the total mass of acid in the resulting solution:

- Total mass of acid = Mass of acid in the 15%-concentration solution + Mass of acid in the 10%-concentration solution - Total mass of acid = 27 g + 12 g = 39 g

Finally, let's calculate the mass fraction of acid in the resulting solution:

- Total mass of the resulting solution = Mass of the 15%-concentration solution + Mass of the 10%-concentration solution - Total mass of the resulting solution = 180 g + 120 g = 300 g

- Mass fraction of acid in the resulting solution = (Total mass of acid / Total mass of the resulting solution) * 100% - Mass fraction of acid in the resulting solution = (39 g / 300 g) * 100% = 13%

Therefore, the mass fraction of acid in the resulting solution is 13%.