basic

Ion Product Q vs Ksp Precipitation Prediction Calculator

Q > Ksp → precipitate forms; Q < Ksp → dissolves.

Calculates the reaction quotient Q = [Mⁿ⁺]^a · [Xᵐ⁻]^b and compares it to Ksp. If Q > Ksp, precipitation occurs; Q < Ksp, no precipitate.

Dr. Helena Ortiz By Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

mol/L
mol/L

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

Q = [Mⁿ⁺]^a × [Xᵐ⁻]^b; compare Q vs Ksp

In depth

Calculates the reaction quotient Q = [Mⁿ⁺]^a · [Xᵐ⁻]^b and compares it to Ksp. If Q > Ksp, precipitation occurs; Q < Ksp, no precipitate.