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NaCl:
K(-): 2H⁺ + 2e⁻ --> H₂
A(+): 2Cl⁻ --> Cl₂ + 2e⁻
CuSO₄:
K(-): Cu²⁺ + 2e⁻ --> Cu
A(+): H₂O --> 2H⁺ + 0,5O₂ + 2e⁻
AgNO₃:
K(-): Ag⁺ + 1e⁻ --> Ag
A(+): H₂O --> 2H⁺ + 0,5O₂ + 2e⁻
H₂SO₄:
K(-): 2H⁺ + 2e⁻ --> H₂
A(+): H₂O --> 2H⁺ + 0,5O₂ + 2e⁻
NaOH
K(-): 2H₂O + 2e⁻ --> H₂ + 2OH⁻
A(+): 2OH⁻ --> H₂O + 0,5O₂ + 2e⁻
KI:
K(-): 2H⁺ + 2e⁻ --> H₂
A(+): 2I⁻ --> I₂ + 2e⁻
K₂S
K(-): 2H⁺ + 2e⁻ --> H₂
A(+): S²⁻ --> S + 2e⁻