## medium effect

https://doi.org/10.1351/goldbook.M03815
The medium effect on ionic species B due to transfer from solvent $$\text{S}_{1}$$ to solvent $$\text{S}_{2}$$ (number) is defined by $R\ T\ \ln \gamma _{\text{S}_{1}}^{\text{S}_{2}}\left(\text{B}\right)=\mu _{\text{B}}^{\text{o},\text{S}_{2}}- \mu _{\text{B}}^{\text{o},\text{S}_{1}}$ where $$R$$ is the @[email protected], $$T$$ is the @[email protected] and $$\mu _{\text{B}}^{\text{o},\text{S}_{i}}$$ is the standard @[email protected] of B in solvent $$\text{S}_{i}$$ (where $$i$$ = 1 or 2), the reference states being the same in both solvents. $$\gamma _{\text{S}_{1}}^{\text{S}_{2}}(\text{B})$$ is not an exactly @[email protected]
Source:
PAC, 1974, 37, 499. (Electrochemical nomenclature) on page 508 [Terms] [Paper]