الفهرس 
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Abstract
The conductance of dilute solutions of acetylcholine halides and perchlorate is measured in water and acetonitrile at (30, 35 and 40oC) and also acetonitrile – water mixtures at 25oC. Approximate values of Λo have been taken from Λ versus C1/2 plots. More accurate values of Λo were obtained by applying the (Fuoss – Kraus – Shedlovsky) equation. Finally, the (Fuoss – Onsager) equation was solved to give the correct values of the constants Λo , J , KA and ao (the closest distance of approach) for each salt in different solvents. The thermodynamic parameters for water and acetonitrile solutions at different temperatures (25, 30, 35, 40oC) were calculated.