CuSO₄ dissociates into one Cu²⁺ and one SO₄²⁻ per formula unit. The product of ion activities is $(m\gamma_+)(m\gamma_-)=m^2\gamma_\pm^2$ under the molal-standard-state convention, A. Ionic charge magnitude does not change the one-to-one stoichiometric exponents.
More Electrochemistry: Standard electrode potential and electrochemical cells. Nernst Equation and its application, relationship between electrode potential and thermodynamic quantities, Potentiometric and conductometric titrations. Ionic mobility and conductivity. Kohlrausch’s law, Debye-Hückel limiting law. Debye-Hückel- Onsager equation. questions
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