Question

2 Al + 3 H2SO4 --> Al2(SO4)3 + 3 H2

How many grams of hydrogen are produced when 7.5 grams sulfuric acid reacts with plenty of aluminum?
Answer:

Answer 1

The answer to your question is 0.15 g of H₂

Step-by-step explanation:

Data

mass of H₂ =

mass of H₂SO₄ = 7.5 g

Balanced chemical reaction

2Al + 3H₃SO₄ ⇒ Al₂(SO₄)₃ + 3H₂

Process

1.- Calculate the molar mass of hydrogen and sulfuric acid

H₂ = 3(2) = 6 g

H₂SO₄ = 2 + 32 + (16 x 4) = 3 x 98 g = 294 g

2.- Use proportions to solve this problem

294 g of H₂SO₄ ---------------- 6 g of H₂

7.5 g of H₂SO₄ ---------------- x

x = (7.5 x 6)/294

x = 45/294

x = 0.15 g of H₂