Answer to Question #111980 in Chemistry for bailey

Question

How many liters of hydrogen at STP can be produced from 28.0 g of zinc reacting with H2SO4?

Answer 1

Solution:

1 mol of Zn has mass of 65.38 g.

The amount of Zn is (28.0 g) / (65.38 g/mol) = 0.428 mol.

The balanced chemical equation:

Zn + H₂SO₄ = ZnSO₄ + H₂

According to the chemical equation: n(Zn) = n(H₂).

The amount of H₂ produced is the same as the amount of Zn consumed (0.428 mol).

n(H₂) = 0.428 mol.

1 mol of ideal gas will occupy 22.4 L at STP.

The H₂ will occupy 0.428 mol × 22.4 L/mol = 9.5872 L = 9.59 L.

V(H₂) = 9.59 L.

Answer: 9.59 L of hydrogen (H₂) can be produced.