Question

Сколько воды нужно выпарить из 12 л 60%ого соляного раствора чтобы его концентрация стала равна 85? Помогите Срочно! даю 50 баллов Сделайте с помощью таблицы прошу

Answer 1

Ответ:вот

Объяснение:

Answer 2

Calculation of Water Evaporation from a Salt Solution

To determine the amount of water that needs to be evaporated from a 12 L 60% salt solution to achieve a concentration of 85%, we can use a table to track the changes in the solution's composition.

Let's break down the problem into steps:

Step 1: Initial Solution - Initial volume of the solution: 12 L - Initial concentration of the solution: 60% - Initial amount of salt in the solution: 12 L * 0.6 = 7.2 L

Step 2: Final Solution - Final concentration of the solution: 85%

Step 3: Calculation - Let's assume that x liters of water need to be evaporated from the initial solution. - The final volume of the solution will be (12 - x) L. - The final amount of salt in the solution will remain the same at 7.2 L.

Using the formula for concentration:

Concentration = Amount of solute / Volume of solution

We can set up the following equation:

0.85 = 7.2 L / (12 - x) L

To solve for x, we can cross-multiply and solve the equation:

0.85 * (12 - x) = 7.2

Simplifying the equation:

10.2 - 0.85x = 7.2

0.85x = 10.2 - 7.2

0.85x = 3

x = 3 / 0.85

x ≈ 3.53 L

Therefore, approximately 3.53 liters of water need to be evaporated from the initial 12 L 60% salt solution to achieve a concentration of 85%.

Table Representation

| Step | Volume of Solution (L) | Concentration (%) | Amount of Salt (L) | |------|-----------------------|--------------------|--------------------| | Initial Solution | 12 | 60% | 7.2 | | Final Solution | 12 - x | 85% | 7.2 |

Using the calculated value of x (approximately 3.53 L), we can fill in the table:

| Step | Volume of Solution (L) | Concentration (%) | Amount of Salt (L) | |------|-----------------------|--------------------|--------------------| | Initial Solution | 12 | 60% | 7.2 | | Final Solution | 12 - 3.53 ≈ 8.47 | 85% | 7.2 |

Please note that the values in the table are rounded for simplicity.

I hope this explanation helps! Let me know if you have any further questions.