Cr₂O₃ + 6HI = 2CrI₃ + 3H₂O
Cr₂O₃+6H⁺+6I⁻ = 2Cr³⁺+6I⁻ + 3H₂O
Cr₂O₃+6H⁺ = 2Cr³⁺+3H₂O
Mg(NO₃)₂ + Na₂S = MgS + 2NaNO₃
Mg²⁺+2NO₃⁻ + 2Na⁺+S²⁻ = Mg²⁺ + S²⁻ + 2Na⁺+2NO₃⁻
Реакция не идет
CoCO₃ + H₂SO₄ = CoSO₄ + H₂O + CO₂
CoCO₃ + 2H⁺+SO₄²⁻ = Co²⁺+SO₄²⁻ + H₂O + CO₂
CoCO₃ + 2H⁺ = H₂O + CO₂
FeO + 2HCl = FeCl₂ + H₂O
FeO + 2H⁺ + 2Cl⁻ = Fe²⁺ + 2Cl⁻ + H₂O
FeO + 2H⁺ = Fe²⁺ + H₂O