Question

К 7 л 60%-го раствора добавили 3 л воды.Опрделите процент кислоты содержащийся в этом растворе

Answer 1

1) 7*60/100=4,2  кислоты в растворе2) 7+3=10 л масса нового р-ра3) 4,2*100/10= 42 % содержание кислоты в повышенном растворе

Answer 2

Calculation of Acid Percentage in the Solution

To determine the percentage of acid in the solution, we need to consider the initial concentration of the acid and the dilution that occurred when water was added.

Given: - Initial solution volume: 7 liters - Initial solution concentration: 60%

When 3 liters of water is added to the 7-liter solution, the total volume of the solution becomes 7 + 3 = 10 liters.

To calculate the percentage of acid in the solution after dilution, we can use the following formula:

Percentage of Acid = (Volume of Acid / Total Volume) * 100

Since the initial solution was a 60% acid solution, the volume of acid in the initial solution is 60% of 7 liters, which is 0.6 * 7 = 4.2 liters.

Substituting the values into the formula:

Percentage of Acid = (4.2 liters / 10 liters) * 100

Simplifying the equation:

Percentage of Acid = 42%

Therefore, the percentage of acid in the solution after adding 3 liters of water is 42%.