Common Ion Effect

Common Ion Effect is referred to attenuation of the solubility of a barely soluble substances – weak electrolytes in the presence of a common ion. In other words, if ion that released to a solution as a result of dissociation of a weak electrolyte (salt, etc…) has been already presented to a solution from another source, then solubility of the former weak electrolyte will decrease. Importantly, Ksp – the solubility products equilibrium constant will obviously remain the same. And all that said is to comply with Le Chatelier’s principle and with simple equilibrium constant equation considerations.

All theoretical aspects presented below have been implemented in “Solubility Products”, the scientific application available on Apple iOS Store and for Mac .

Solubility Products

Solubility Products is a scientific application available on Play Store, Apple Store for iOS and Mac, that helps with accurate estimation of concentrations of solutes upon dissolution of solid compounds of low solubility. The tool is applicable to various chemical equilibrium tasks, such as salt dissociation to electrolytes, common-ion effect, separation by sedimentation and precipitation titration. Application derives final, equilibrium concentrations of solutes based on equilibrium constant (Ksp), initial concentrations, solubility and stoichiometric coefficients. Additionally, app calculates reaction quotient for any given concentrations and stoichiometry.