Question

К 300 г раствора с массовой долей соли 10 % добавили 50 г воды. Рассчитайте массовую долю соли в полученном растворе.

Answer 1

Массовая доля = масса соли/масса раствора соли
масса соли = 300*0,1= 30(г)
масса раствора(после добавления воды)= 300+50=350(г)
массовая доля соли в полученном растворе= масса соли/масса полученного раствора соли.
массовая доля соли в полученном растворе=30/350=8,57%

Answer 2

Calculation of Mass Fraction of Salt in the Solution

To calculate the mass fraction of salt in the solution, we need to consider the initial mass of the solution and the mass of water added.

Given: - Initial mass of the solution = 300 g - Mass fraction of salt in the solution = 10% - Mass of water added = 50 g

To calculate the mass fraction of salt in the resulting solution, we can use the following formula:

Mass fraction of salt = (Mass of salt / Total mass of solution) x 100

First, let's calculate the mass of salt in the initial solution:

Mass of salt in the initial solution = Mass fraction of salt x Total mass of solution

Mass of salt in the initial solution = 10% x 300 g

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

Total mass of resulting solution = Initial mass of solution + Mass of water added

Total mass of resulting solution = 300 g + 50 g

Finally, we can calculate the mass fraction of salt in the resulting solution:

Mass fraction of salt in the resulting solution = (Mass of salt in the initial solution / Total mass of resulting solution) x 100

Let's plug in the values and calculate the mass fraction of salt in the resulting solution:

Mass fraction of salt in the resulting solution = (10% x 300 g) / (300 g + 50 g)

Calculating the above expression gives us the mass fraction of salt in the resulting solution.

Please note that the exact calculation may vary depending on the specific values provided in the question.