Question

К 200 МЛ ВОДЫ прилили 50 г.98%-ного раствора серной кислоты.Определите массовую долю кислоты в полученном растворе

Answer 1

масса прилитой H2SO4(кислоты)=50*0,98=49 г
масса полученного раствора = 200+50=250 г
массовая доля кислоты = 49/250=0,196, или 19,6%

ПО моему так.

Answer 2

Calculation of Mass Fraction of Sulfuric Acid in the Solution

To determine the mass fraction of sulfuric acid in the solution, we need to calculate the mass of sulfuric acid in the 50 g of 98% sulfuric acid solution and then divide it by the total mass of the resulting solution.

Let's calculate it step by step:

1. Calculate the mass of sulfuric acid in the 50 g of 98% sulfuric acid solution: - Mass of sulfuric acid = 50 g * (98/100) = 49 g

2. Calculate the total mass of the resulting solution: - Total mass of the resulting solution = 200 g + 50 g = 250 g

3. Calculate the mass fraction of sulfuric acid in the resulting solution: - Mass fraction of sulfuric acid = (mass of sulfuric acid / total mass of solution) * 100 - Mass fraction of sulfuric acid = (49 g / 250 g) * 100 = 19.6%

Therefore, the mass fraction of sulfuric acid in the resulting solution is approximately 19.6%.

Please note that the calculation assumes that the volume of the solution remains constant when the sulfuric acid is added.