Question detail

Calculate the cell potential for a galvanic cell composed of a copper half-cell with a standard electrode potential of +0.34 V and a zinc half-cell with a standard electrode potential of -0.76 V.

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Question

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Topic

Electrode potentials and electrochemical cells (A-level only)

Question

Calculate the cell potential for a galvanic cell composed of a copper half-cell with a standard electrode potential of +0.34 V and a zinc half-cell with a standard electrode potential of -0.76 V.

Answer

The cell potential is +1.10 V. This answer is anchored to Feasibility and applications of cells (A-level only). This version is uniquely anchored to Feasibility and applications of cells (A-level only). Retrieval anchor: A-level cue be959539.

Explanation

The cell potential is +1.10 V. This answer is anchored to Feasibility and applications of cells (A-level only). is correct because it supports the objective: Predict the feasibility of redox reactions using electrode potentials.. The reasoning stays within Feasibility and applications of cells (A-level only) and avoids drifting into a similar A-Level Chemistry idea. This item is treated as conceptual revision rather than a formal calculation item because the validated answer is an explanation or option choice, not a worked numerical response. Use silver nitrate and barium chloride tests for anion identification; do not describe those tests as cation tests.

Common mistake

Misunderstanding Electrode Potential Calculation

Students often confuse the standard electrode potential values and fail to apply the correct signs when calculating cell potentials.

To predict the feasibility of redox reactions using electrode potentials, use the formula: E_cell = E_cathode - E_anode. Substitute the correct standard electrode potentials for the cathode and anode, ensuring to maintain the correct signs. For example, if E_cathode = +0.76 V and E_anode = -0.44 V, then E_cell = 0.76 - (-0.44) = 0.76 + 0.44 = 1.20 V. Thus, the cell potential is 1.20 V, indicating the reaction is feasible. Keep the correction anchored to Feasibility and applications of cells (A-level only) and the objective: Predict the feasibility of redox reactions using electrode potentials.

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