С чем раегирует KOH:
CuSO₄ +2KOH = Cu(OH)₂↓ + K₂SO₄
Cu²⁺ + SO₄²⁻ +2K⁺ + 2OH⁻ = Cu(OH)₂↓ + 2K⁺ + SO₄²⁻
Cu²⁺ + 2OH⁻ = Cu(OH)₂↓
MgSO₃ + 2KOH = Mg(OH)₂↓ + K₂SO₃
Mg²⁺ + SO₃²⁻ + 2K⁺ + 2OH⁻ = Mg(OH)₂↓ + 2K⁺ + SO₃²⁻
Mg²⁺ + 2OH⁻ = Mg(OH)₂↓
H₃PO₄ + 3KOH = K₃PO₄ + 3H₂O
3H⁺ + PO₄³⁻ + 3K⁺ + 3OH⁻ = 3K⁺ + PO₄³⁻ + 3H₂O
3H⁺ + 3OH⁻ = 3H₂O