Question

Расчитайте массы воды и соли,необходимые для приготовления 200 г. раствора с массовой долей соли 0,25

Answer 1

200 умножить на 0.25=50   200-50=150 гр воды = 0.75

Answer 2

Calculating Mass of Water and Salt for a 200g Solution with 0.25 Mass Fraction of Salt

To calculate the masses of water and salt needed to prepare a 200g solution with a mass fraction of salt of 0.25, we can use the following steps:

1. Calculate the Mass of Salt: - The mass fraction of salt is 0.25, which means the mass of salt in the solution is 0.25 * 200g. - This gives us the mass of salt required for the solution.

2. Calculate the Mass of Water: - The total mass of the solution is 200g, and we already know the mass of salt. Therefore, the mass of water can be calculated as the difference between the total mass and the mass of salt.

3. Performing the Calculations: - Let's perform the calculations based on the given information.

Calculation

1. Mass of Salt: - Mass of salt = 0.25 * 200g = 50g.

2. Mass of Water: - Mass of water = Total mass - Mass of salt - Mass of water = 200g - 50g = 150g.

Therefore, to prepare a 200g solution with a mass fraction of salt of 0.25, you would need 50g of salt and 150g of water.

Feel free to ask if you have any more questions or need further assistance!