Describe the procedure to measure the EMF of an electrochemical cell using a standard hydrogen electrode.

To measure the EMF of an electrochemical cell, connect the cell to a voltmeter. Ensure the standard hydrogen electrode is at 1 atm pressure and 298 K. Record the voltage reading, which represents the EMF of the cell. This answer is anchored to Standard electrode potentials (A-level only).

To measure the EMF of an electrochemical cell, connect the cell to a voltmeter. Ensure the standard hydrogen electrode is at 1 atm pressure and 298 K. Record the voltage reading, which represents the EMF of the cell. is the best answer because it directly supports the AQA A-Level Chemistry objective to required practical: measure the EMF of an electrochemical cell. This reasoning is anchored to Standard electrode potentials (A-level only) in Electrode potentials and electrochemical cells (A-level only), and it separates electrochemical cell from similar A-Level ideas rather than relying on a vague recall statement. Other options are weaker if they use the wrong evidence, calculation, mechanism, observation, unit, or conclusion for this subtopic.