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Question 37

From Chemistry HL Paper 1A (May 2025, TZ2)

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  1. What is the standard cell potential, Ecell⊖E^\ominus_{\text{cell}}, of the following cell?
Diagram of an electrochemical cell with a voltmeter, salt bridge, Ag(s) and Mg(s) electrodes in Ag+(aq) and Mg2+(aq) solutions, respectively. Standard electrode potentials are provided.
Diagram of an electrochemical cell with a voltmeter, salt bridge, Ag(s) and Mg(s) electrodes in Ag+(aq) and Mg2+(aq) solutions, respectively. Standard electrode potentials are provided.

Ag+^+(aq) + e−^- ⇌ Ag(s) E⊖=+0.80 VE^\ominus = +0.80 \text{ V}
Mg2+^{2+}(aq) + 2e−^- ⇌ Mg(s) E⊖=−2.37 VE^\ominus = -2.37 \text{ V}