Answer to Question #22102 in Inorganic Chemistry for khadijah

Question

Predict the mass of hydrogen gas produced when 2.73 g of aluminum reacts in a single replacement reaction with excess sulphuric acid.

Answer 1

2Al+ 3H₂SO₄ = Al₂(SO₄)₃ + 3H₂

First, look for the amount of substance aluminum oxide:
n(Al2O3)=m/M
n(Al2O3)= 100g/ 102g/mol = 0.9999 mol
1 mol Al2O3 ----> 2mol Al
n(Al)= 1,9998 mol
m(Al)= n*M
m(Al) = 1,9998mol*27 g/mol = 53,99 g

Answer: 53,99g