MDCAT Electrochemistry 2026 — Galvanic Cells, EMF, Electrolysis

Galvanic vs Electrolytic Cell

• Galvanic — spontaneous redox; produces electricity; anode (−), cathode (+)
• Electrolytic — non-spontaneous; needs power; anode (+), cathode (−)

Standard Electrode Potentials

• E°_cell = E°_cathode − E°_anode
• Positive E°_cell → spontaneous

Faraday's Laws of Electrolysis

• 1st — mass deposited ∝ charge passed (m = ZIt)
• 2nd — mass of different substances ∝ equivalent weights

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