Common Ion EffectChemistry
Common Ion Effect on Solubility & Le Chatelier Calculator
Calculate the dramatic suppression of sparingly soluble salt dissolution when a common ion is introduced, benchmarking against pure water solubility.
Calculated Result
Solubility in Common Ion Solution
-0.05mol/L
Calculator Inputs
-
Quick select:
M
Quick select:
Solubility in Common Ion Solution
-0.05mol/L
Pure Water Solubility (s0)
0 mol/L
Solubility Suppression Factor
1 x lower
Pure Water vs Common Ion Solubility Suppression
Pure Water s0
0 mol/L(0%)
New Solubility s'
-0.05 mol/L(0%)
Standard analytical chemistry tool for selective precipitation and Le Chatelier's equilibrium displacement.
Calculation Methodology
By Le Chatelier's Principle, adding a common ion (concentration C) shifts the dissolution equilibrium backward, suppressing solubility: s^2 + C*s - Ksp = 0. Solubility Suppression Ratio = s_pure / s_common.
Frequently Asked Questions
Because the product of ionic concentrations cannot exceed Ksp at equilibrium; elevating one ion's concentration forces the other ion to precipitate out to maintain constant Ksp.
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