Question

К 200 г 20%-ного раствора соли прилили 50 г воды. Вычислите массовую долю соли в полученном растворе.

Answer 1

Решение на фотографии

Answer 2

Calculation of the Mass Fraction of Salt in the Solution

To calculate the mass fraction of salt in the solution, we need to determine the total mass of the solution and the mass of the salt present.

Given: - Initial solution: 200 g of a 20% salt solution - Added water: 50 g

To find the mass of the salt in the solution, we can use the following formula:

Mass of Salt = Total Mass of Solution * Mass Fraction of Salt

The total mass of the solution is the sum of the initial solution and the added water:

Total Mass of Solution = Initial Solution Mass + Added Water Mass

Let's calculate the mass of the salt in the solution step by step:

1. Calculate the total mass of the solution: - Initial solution mass: 200 g - Added water mass: 50 g - Total mass of the solution = Initial solution mass + Added water mass

2. Calculate the mass of the salt: - Mass fraction of salt: 20% (given in the question) - Mass of salt = Total mass of the solution * Mass fraction of salt

3. Calculate the mass fraction of salt in the solution: - Mass fraction of salt in the solution = Mass of salt / Total mass of the solution

Let's perform the calculations:

1. Calculate the total mass of the solution: - Initial solution mass: 200 g - Added water mass: 50 g - Total mass of the solution = 200 g + 50 g = 250 g

2. Calculate the mass of the salt: - Mass fraction of salt: 20% - Mass of salt = 250 g * 0.20 = 50 g

3. Calculate the mass fraction of salt in the solution: - Mass fraction of salt in the solution = 50 g / 250 g = 0.20 = 20%

Therefore, the mass fraction of salt in the obtained solution is 20%.

Please note that the provided search results did not contain specific information related to the given question. However, the calculations provided above are based on the given information and the general principles of calculating mass fractions in solutions.