Question

Упариванием 500 г рас­тво­ра с мас­со­вой долей соли 10 % по­лу­чен раствор с мас­со­вой долей соли 14 %. Вычислите массу вы­па­рен­ной при этом воды. Ответ ука­жи­те в грам­мах с точ­но­стью до целых.

Answer 1

Решение не полное,ответ правильный точно

Answer 2

Calculation of the Mass of Evaporated Water

To calculate the mass of evaporated water, we need to determine the initial mass of the solution and the final mass of the solution after evaporation.

Given: - Initial mass of the solution: 500 g - Mass fraction of salt in the initial solution: 10% - Mass fraction of salt in the final solution: 14%

To find the mass of evaporated water, we can use the concept of mass conservation. The mass of the solution before and after evaporation should remain the same. Therefore, the mass of the evaporated water can be calculated as the difference between the initial mass of the solution and the final mass of the solution.

Let's calculate it step by step:

1. Calculate the mass of salt in the initial solution: - Mass of salt = Mass of solution * Mass fraction of salt - Mass of salt in the initial solution = 500 g * 10% = 50 g

2. Calculate the mass of salt in the final solution: - Mass of salt in the final solution = 500 g * 14% = 70 g

3. Calculate the mass of evaporated water: - Mass of evaporated water = Mass of solution before evaporation - Mass of solution after evaporation - Mass of evaporated water = 500 g - (50 g + 70 g) = 380 g

Therefore, the mass of evaporated water is 380 grams.

Please note that the calculations are based on the given information and assumptions.