☰ Contents · Chemistry

Sulfur oxides. Sulfuric acid

Lessons 32–33 · 2 lessons · I.R. Asqarov, K. G‘opirov, N.X. To‘xtaboyev. Chemistry Grade 8, revised 4th edition. “Yangiyul Poligraph Service”, Tashkent, 2019
Answers are for parents and teachers.
1
How many grams of SO₂ form when 160 g sulfur burns? (S + O₂ → SO₂, M(S) = 32)
2
98 g of H₂SO₄ is in 490 g of solution. What is the mass fraction in per cent?
3
How many mol BaCl₂ are needed for 2 mol Na₂SO₄? (Na₂SO₄ + BaCl₂ → BaSO₄ + 2NaCl)
4
Find the oxidizing agent in Cu + 2H₂SO₄(conc.) → CuSO₄ + SO₂ + 2H₂O.
5
Name two ways to reduce SO₂ emissions.