Question

Карбид алюминия растворили в 250 г. 20 % - го раствора серной кислоты.Выделившийся при этом метан занял объем 4,48л (н.у) Рассчитайте массовую долю получившейся соли и серной кислоты в полученном растворе.

Answer 1

Смотри во вложении.

Answer 2

Calculation of Mass Fraction of Aluminum Carbide and Sulfuric Acid in the Solution

To calculate the mass fraction of aluminum carbide and sulfuric acid in the obtained solution, we need to use the given information.

Given: - Mass of the solution = 250 g - Concentration of the sulfuric acid solution = 20% - Volume of methane gas produced = 4.48 L (at normal conditions)

To calculate the mass fraction of aluminum carbide and sulfuric acid, we need to determine the masses of aluminum carbide and sulfuric acid in the solution.

1. Calculate the mass of sulfuric acid: - The concentration of the sulfuric acid solution is given as 20%. This means that 20% of the solution is sulfuric acid. - We can calculate the mass of sulfuric acid using the formula: mass = concentration * volume. - The volume of the solution is not given, but we can assume it to be equal to the volume of methane gas produced, which is 4.48 L. - The concentration is given as a percentage, so we need to convert it to a decimal by dividing by 100. - Therefore, the mass of sulfuric acid is: mass_sulfuric_acid = 0.20 * 4.48 kg.

2. Calculate the mass of aluminum carbide: - To calculate the mass of aluminum carbide, we need to subtract the mass of sulfuric acid from the total mass of the solution. - The total mass of the solution is given as 250 g. - Therefore, the mass of aluminum carbide is: mass_aluminum_carbide = 250 g - mass_sulfuric_acid.

3. Calculate the mass fraction of aluminum carbide and sulfuric acid: - The mass fraction is calculated by dividing the mass of a component by the total mass of the solution and multiplying by 100%. - The mass fraction of aluminum carbide is: mass_fraction_aluminum_carbide = (mass_aluminum_carbide / 250 g) * 100%. - The mass fraction of sulfuric acid is: mass_fraction_sulfuric_acid = (mass_sulfuric_acid / 250 g) * 100%.

Now let's calculate the values using the given information:

1. Calculate the mass of sulfuric acid: - mass_sulfuric_acid = 0.20 * 4.48 kg = 0.896 kg.

2. Calculate the mass of aluminum carbide: - mass_aluminum_carbide = 250 g - 0.896 kg = 249.104 kg.

3. Calculate the mass fraction of aluminum carbide and sulfuric acid: - mass_fraction_aluminum_carbide = (249.104 kg / 250 g) * 100% = 99.6416%. - mass_fraction_sulfuric_acid = (0.896 kg / 250 g) * 100% = 0.3584%.

Therefore, the mass fraction of aluminum carbide in the solution is approximately 99.64%, and the mass fraction of sulfuric acid is approximately 0.36%.

Please note that the calculations are based on the given information and assumptions made.