When a zinc plate dissolves, a gas with a volume of 2.24 dm 3 is released in sulfuric acid 3.

When a zinc plate dissolves, a gas with a volume of 2.24 dm 3 is released in sulfuric acid 3. find the mass of a solution with a mass fraction of acid 10% will be required for the reaction

1. Let’s compose the equation of the reaction that occurs when a zinc plate is dissolved in sulfuric acid:

Zn + H2SO4 = ZnSO4 + H2 ↑;

2. Let’s find the chemical amount of the spilled hydrogen:

n (H2) = V (H2): Vm = 2.24: 22.4 = 0.1 mol;

3. Determine the amount of sulfuric acid:

n (H2SO4) = n (H2) = 0.1 mol;

4. Calculate the mass of sulfuric acid:

m (H2SO4) = n (H2SO4) * M (H2SO4);

M (H2SO4) = 2 + 32 + 4 * 16 = 98 g / mol;

m (H2SO4) = 0.1 * 98 = 9.8 g;

5. Let’s calculate the mass of the sulfuric acid solution:

m (solution) = m (H2SO4): w (H2SO4) = 9.8: 0.1 = 98 g.

Answer: 98 BC