Question

ОЧЕНЬ СРОЧНО Рассчитайте массу соли в граммах и объем воды в миллилитрах, необходимые для приготовления: а) 320 г 15%-ного раствора​

Answer 1

Ответ:

решение на фото

Объяснение:

Answer 2

Calculation of Mass of Salt and Volume of Water

To calculate the mass of salt and volume of water needed to prepare a 320 g 15% solution, we need to determine the amount of salt and water required.

Step 1: Calculate the mass of salt:

The mass of salt can be calculated using the formula:

Mass of Salt = Mass of Solution × Percentage of Salt / 100

In this case, the mass of the solution is 320 g and the percentage of salt is 15%.

Mass of Salt = 320 g × 15 / 100 = 48 g.

Therefore, you would need 48 grams of salt to prepare the solution.

Step 2: Calculate the volume of water:

To calculate the volume of water, we need to subtract the mass of salt from the total mass of the solution.

Mass of Water = Mass of Solution - Mass of Salt

Mass of Water = 320 g - 48 g = 272 g

Since the density of water is 1 g/mL, the volume of water can be calculated as:

Volume of Water = Mass of Water / Density of Water

Volume of Water = 272 g / 1 g/mL = 272 mL.

Therefore, you would need 272 milliliters of water to prepare the solution.

To summarize, to prepare a 320 g 15% solution, you would need 48 grams of salt and 272 milliliters of water.

Please note that the calculations provided are based on the assumption that the density of the solution is equal to the density of water.