Question

Слили два раствора серной кислоты:240г 30%-го и 180г 5%-г.Расчитайте массовую долю кислоты в полученном растворе

Answer 1

240*0.3=72
180*0.05=9
72+9/240+180=0.19
19% 

Answer 2

240х0,3+180х0,05=81 г-кислоты в чистом виде. 180+240=420г-масса раствора. 81х100/420=19,29%-массовая доля кислоты.

Answer 3

Calculation of the Mass Fraction of Acid in the Solution

To calculate the mass fraction of acid in the resulting solution, we need to determine the total mass of acid in the two solutions and the total mass of the resulting solution.

Given: - Solution 1: 240g of 30% sulfuric acid - Solution 2: 180g of 5% sulfuric acid

To calculate the mass of acid in each solution, we multiply the mass of the solution by the percentage of acid in the solution.

For Solution 1: Mass of acid in Solution 1 = 240g * 0.30 = 72g

For Solution 2: Mass of acid in Solution 2 = 180g * 0.05 = 9g

To calculate the total mass of the resulting solution, we add the masses of the two solutions.

Total mass of resulting solution = 240g + 180g = 420g

Now, we can calculate the mass fraction of acid in the resulting solution by dividing the total mass of acid by the total mass of the resulting solution and multiplying by 100%.

Mass fraction of acid in the resulting solution = (72g + 9g) / 420g * 100% = 81g / 420g * 100% = 19.29%

Therefore, the mass fraction of sulfuric acid in the resulting solution is approximately 19.29%.