Question

Смешаем 500 г 20% раствора HCI с 300 г 35 % раствора HCI. Определить концетрацию

Answer 1

Ну смотри в первом 100г концентрата во втором 105г, значит в 800г будет 205г концентрата. Затем 205 делим на 800 и умножаем на 100 получаем приблизительно 26%. Вот и все)

Answer 2

Calculating Concentration of the Solution

To determine the concentration of the resulting solution after mixing 500g of 20% HCl solution with 300g of 35% HCl solution, we can use the formula for mixing two solutions:

C1V1 + C2V2 = C3V3

Where: - C1 and C2 are the concentrations of the initial solutions - V1 and V2 are the volumes of the initial solutions - C3 is the concentration of the resulting solution - V3 is the total volume of the resulting solution

First, we need to calculate the volumes of the initial solutions. Then we can use these values to find the concentration of the resulting solution.

Calculations

The first step is to calculate the volumes of the initial solutions. We can use the formula:

Volume = (Mass of solute / % concentration) * 100

For the 20% HCl solution: V1 = (500g / 20%) * 100 = 2500 ml

For the 35% HCl solution: V2 = (300g / 35%) * 100 = 857.14 ml

Now, we can use the formula C1V1 + C2V2 = C3V3 to find the concentration of the resulting solution.

Using the Formula

C1V1 + C2V2 = C3V3 (20%)(2500ml) + (35%)(857.14ml) = C3(2500ml + 857.14ml) 500 + 300 = C3(3357.14) C3 ≈ 0.1491

Conclusion

The concentration of the resulting solution after mixing 500g of 20% HCl solution with 300g of 35% HCl solution is approximately 14.91%.