Calculate the mass of a 2% sulfuric acid solution required for the chemical reaction with zinc to produce 1.12 liters of hydrogen.

univerkov | January 17, 2021 | education

Given:
w (H2SO4) = 2% = 0.02
V (H2) = 1.12 L
To find:
m p (H2SO4)
Decision:
H2SO4 + Zn = ZnSO4 + H2
n (H2) = V / Vm = 1.12 L / 22.4 L / mol = 0.05 mol
n (H2): n (H2SO4) = 1: 1
n (H2SO4) = 0.05 mol
m in (H2SO4) = n * M = 0.05 mol * 98 g / mol = 4.9 g
m p (H2SO4) = m w / w = 4.9 g / 0.02 = 245 g
Answer: 245 g

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