alleryStart learning →The instrument used to measure the potential difference between two half-cells is a:
ABarometer
BCalorimeter
CManometer
DVoltmeter
Answer & Solution
Correct answer: D. Voltmeter
1. A cell's driving force appears as a potential difference across its terminals.
2. A voltmeter in the external circuit allows measurement of the potential difference between the two half-cells.
3. A barometer measures atmospheric pressure and a calorimeter measures heat.
4. Neither of those would register a cell potential.
_Source: OpenStax Chemistry 2e (CC BY 4.0), Ch 17 'Electrochemistry', sections 17.1-17.7_
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