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Chemistry · L4 · Ion flow direction in a concentration cell

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Shows how the direction of electron and ion flow in a concentration cell is decided purely by which half-cell is more concentrated versus more dilute — the more concentrated side always reduces (cathode), the more dilute side always oxidises (anode).

by @openstemUpdated Chemistry
Same electrode + same ion,two different concentrationsWhich side ismore concentrated?More concentrated half-cell= CATHODEreduction: Mⁿ⁺ + ne⁻ → M(ion concentration falls)More dilute half-cell= ANODEoxidation: M → Mⁿ⁺ + ne⁻(ion concentration rises)Concentrations convergeover timeEqual concentrations:Q = 1, Ecell = 0(equilibrium reached)This sideThe other sideelectrons flow through external wireions migrate via salt bridge

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