Mg + CuCl₂ = MgCl₂ + Cu;
Mg⁰ + Cu²⁺ + 2Cl⁻ = Mg²⁺ + 2Cl⁻ + Cu⁰;
Mg⁰ + Cu²⁺ = Mg²⁺ + Cu⁰.
2Na + H₂SO₄ = Na₂SO₄ + H₂↑;
2Na⁰ + 2H⁺ + SO₄²⁻ = 2Na⁺ + SO₄²⁻ + H₂↑.
2Na⁰ + 2H⁺ + 2Na⁺ + H₂↑.
Ag + H₂O = не знаю ._.
Mn + 2AgNO₃ = Mn(NO₃)₂ + 2Ag;
Mn⁰ + 2Ag⁺ + 2NO₃⁻ = Mn²⁺ + 2NO₃⁻ + 2Ag⁰;
Mn⁰ + 2Ag⁺ = Mn²⁺ + 2Ag⁰.