Question

11. К 300г 20%-го раствора соляной кислоты добавили 100г воды. Вычислите массовую кислоты в образовавшемся растворе. ​

Answer 1

Ответ:

Объяснение:

Всего кислоты получится 300 * 20%=60 грамм и масса раствора увеличится, и массовая доля получится 60:(300+100)*100=15%

Answer 2

Calculating the Mass of Acid in the Solution

To calculate the mass of acid in the resulting solution, we can use the formula:

Mass of acid = (Volume of solution) × (Concentration of acid)

Given: - Initial volume of 20% HCl solution = 300g - Added volume of water = 100g

The resulting volume of the solution after adding water is 300g + 100g = 400g.

The concentration of the acid in the resulting solution can be calculated using the initial concentration and the dilution formula:

Concentration of resulting solution = (Initial volume of acid) / (Resulting volume of solution)

Using the given initial volume of 20% HCl solution (300g) and the resulting volume of the solution (400g), we can calculate the concentration of the acid in the resulting solution.

Calculation Steps

1. Calculate the concentration of the acid in the resulting solution. 2. Use the concentration to find the mass of the acid in the resulting solution.

Calculation

1. Concentration of acid in the resulting solution: - Initial concentration of 20% HCl solution = 20% - Initial volume of 20% HCl solution = 300g - Resulting volume of the solution = 400g

Using the dilution formula: Concentration of acid = (Initial concentration × Initial volume) / Resulting volume Concentration of acid = (20% × 300g) / 400g Concentration of acid = 0.2 × 300 / 400 Concentration of acid = 0.15

The concentration of the acid in the resulting solution is 15%.

2. Mass of acid in the resulting solution: - Volume of resulting solution = 400g - Concentration of acid in the resulting solution = 15%

Using the formula: Mass of acid = (Volume of solution) × (Concentration of acid) Mass of acid = 400g × 0.15 Mass of acid = 60g

Answer

The mass of acid in the resulting solution is 60g.