Объяснение:
3) Cr(OH)₃ + 3HCl = CrCl₃ + 3H₂O
Cr(OH)₃ + 3H⁺ + 3Cl⁻ = Cr³⁺ + 3Cl⁻ + 3H₂O
Cr(OH)₃ + 3H⁺ = Cr³⁺ + 3H₂O
4) 2NaOH + SiO₂ = Na₂SiO₃ + H₂O
2Na⁺ + 2OH⁻ + SiO₂ = 2Na⁺ + SiO₃²⁻ + H₂O
2OH⁻ + SiO₂ = SiO₃²⁻ + H₂O
5) Ba + 2H₂O = Ba(OH)₂ + H2
Ba + 2H₂O = Ba²⁺ + 2OH⁻ + H₂
6) AlCl₃ + 3NaOH = Al(OH)₃↓ + 3NaCl
Al³⁺ + 3Cl⁻ + 3Na⁺ + 3OH⁻ = Al(OH)₃↓ + 3Na⁺ + 3Cl⁻
Al³⁺ + 3OH⁻ = Al(OH)₃↓
7) Fe₂(SO₄)₃ + 6NaOH = 2Fe(OH)₃↓ + 3Na₂SO₄
2Fe³⁺ + 3SO₄²⁻ + 6Na⁺ + 6OH⁻ = 2Fe(OH)₃↓ + 6Na + 3SO₄²⁻
2Fe³⁺ + 6OH⁻ = 2Fe(OH)₃↓
Fe³⁺ + 3OH⁻ = Fe(OH)₃↓
8) 6KOH + 3S = K₂SO₃ + 2K₂S + 3H₂O
6K⁺ + 6OH⁻ + 3S = 2K⁺ + SO₃²⁻ + 4K⁺ + 2S²⁻ + 3H₂O
6OH⁻ + 3S = SO₃²⁻ + 2S²⁻ + 3H₂O
9) 2NaOH + Cl₂ = NaCl + NaOCl + H₂O
2Na⁺ + 2OH⁻ + Cl₂ = Na⁺ + Cl⁻ + Na⁺ + OCl⁻ + H₂O
2OH⁻ + Cl₂ = Cl⁻ + OCl⁻ + H₂O
10) Ba(OH)₂ + HCl = BaOHCl + H₂O
Ba²⁺ + 2OH⁻ + H⁺ + Cl⁻ = BaOH⁺ + Cl⁻ + H₂O
Ba²⁺ + + 2OH⁻ + H⁺ = BaOH⁻ + H₂O
