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Chemistry: Electrochemistry Flashcards

7 cards from real AP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. In a galvanic cell, oxidation always occurs at which electrode?

    Answer: The anode

    Oxidation occurs at the anode in any electrochemical cell.

  2. What is the standard cell potential of a cell with E°(cathode) = +0.80 V and E°(anode) = +0.34 V?

    Answer: +0.46 V

    E°cell = E°cathode − E°anode = 0.80 − 0.34 = +0.46 V.

  3. A positive standard cell potential indicates the reaction is:

    Answer: Spontaneous

    A positive E°cell corresponds to a negative ΔG°, meaning the reaction is spontaneous.

  4. In a salt bridge containing KNO₃, which ions migrate toward the anode compartment?

    Answer: Anions (NO₃⁻)

    Anions migrate toward the anode to balance the positive charge from oxidation.

  5. Which equation relates standard cell potential to the equilibrium constant?

    Answer: ΔG° = −RT ln K = −nFE°

    ΔG° = −nFE° = −RT ln K links cell potential and the equilibrium constant.

  6. How many electrons are transferred in the balanced reaction Cu²⁺ + 2e⁻ → Cu?

    Answer: 2

    Copper(II) gains two electrons to become neutral copper metal.

  7. In the cell notation Zn | Zn²⁺ || Cu²⁺ | Cu, what does the double vertical line represent?

    Answer: The salt bridge

    The double line denotes the salt bridge separating the two half-cells.