Question

14) к 80 г 15%-го раствора соли добавили 20 г воды. Определите концентрацию получившегося раствора.

Answer 1

Ответ:

12%соли

Пошаговое объяснение:

мне нужно 20 символов

Answer 2

Calculating the Concentration of the Solution

To calculate the concentration of the resulting solution after adding 20g of water to a 80g 15% salt solution, we can use the formula:

Concentration = (Mass of solute / Total mass of solution) x 100%

Given: - Mass of the original solution (solute) = 80g - Mass of water added = 20g - Percentage of the original solution = 15%

Using the formula, we can calculate the concentration of the resulting solution.

Step 1: Calculate the mass of the resulting solution: - Mass of the resulting solution = Mass of the original solution + Mass of water added - Mass of the resulting solution = 80g + 20g = 100g

Step 2: Calculate the mass of the solute in the resulting solution: - Mass of the solute in the resulting solution = Mass of the original solution * (Percentage of the original solution / 100) - Mass of the solute in the resulting solution = 80g * (15 / 100) = 12g

Step 3: Calculate the concentration of the resulting solution: - Concentration = (Mass of solute / Total mass of solution) x 100% - Concentration = (12g / 100g) x 100% - Concentration = 12%

Therefore, the concentration of the resulting solution is 12%.