Question

К раствору, который содержит 40 г соли, добавили 200 г воды, после чего его концентрация уменьшилась на 10%. сколько воды содержал раствор и какова была его концентрация? (желательно с таблицей)ОЧЕНЬ СРОЧНО

Answer 1

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Answer 2

Calculation of Water Content and Concentration

To calculate the water content and concentration of the solution, we need to use the given information.

Given: - Initial amount of salt in the solution: 40 g - Amount of water added: 200 g - The concentration of the solution decreased by 10%

To find the water content, we can subtract the initial amount of salt from the total mass of the solution. The concentration can be calculated by dividing the mass of salt by the total mass of the solution.

Let's calculate the water content and concentration step by step:

1. Calculate the mass of the solution after adding water: - Initial mass of salt: 40 g - Mass of water added: 200 g - Total mass of the solution: 40 g + 200 g = 240 g

2. Calculate the decrease in concentration: - The concentration decreased by 10% - 10% of the initial concentration = 10% of 40 g = 4 g

3. Calculate the final mass of salt in the solution: - Initial mass of salt: 40 g - Decrease in concentration: 4 g - Final mass of salt: 40 g - 4 g = 36 g

4. Calculate the water content: - Total mass of the solution: 240 g - Mass of salt: 36 g - Mass of water: Total mass - Mass of salt = 240 g - 36 g = 204 g

5. Calculate the concentration of the solution: - Mass of salt: 36 g - Total mass of the solution: 240 g - Concentration = (Mass of salt / Total mass of the solution) * 100%

Let's summarize the calculations in a table:

| Initial Mass of Salt | Mass of Water Added | Total Mass of the Solution | Decrease in Concentration | Final Mass of Salt | Water Content | Concentration | |----------------------|---------------------|----------------------------|---------------------------|--------------------|---------------|---------------| | 40 g | 200 g | 240 g | 4 g | 36 g | 204 g | 15% |

Therefore, the solution initially contained 204 g of water and had a concentration of 15%.

Please note that the calculations are based on the given information and assumptions. If there are any additional details or specific requirements, please let me know.