Sulfuric acid industry. Practical work 2
Answers are for parents and teachers.
1
How many grams of H₂SO₄ can be made in theory from 240 g pyrite (M = 120)? (FeS₂ → 2H₂SO₄)
392 g
2
Ba(NO₃)₂ + H₂SO₄ → BaSO₄ + 2HNO₃. How many mol H₂SO₄ are needed for 233 g BaSO₄?
1 mol
3
In Zn + H₂SO₄ → ZnSO₄ + H₂, how many litres of H₂ at s.t.p. come from 5 mol Zn?
112 l
4
Write a plan for telling K₂SO₄ and Na₂S solutions apart (two reagents).
BaCl₂: white precipitate with K₂SO₄; Pb(NO₃)₂: black precipitate with Na₂S (no acid is used).
5
Why are all solutions taken in small amounts in the experiment?
It reduces hazard, waste and use of chemicals.