Which change to a hydrogen electrode has no effect on the electrode potential?
A - AQA - A-Level Chemistry - Question 11 - 2022 - Paper 3
Question 11
Which change to a hydrogen electrode has no effect on the electrode potential?
A. the concentration of the hydrogen ions
B. the pressure of the hydrogen
C. the surf... show full transcript
Worked Solution & Example Answer:Which change to a hydrogen electrode has no effect on the electrode potential?
A - AQA - A-Level Chemistry - Question 11 - 2022 - Paper 3
Step 1
A. the concentration of the hydrogen ions
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Answer
Changing the concentration of hydrogen ions directly affects the electrode potential according to the Nernst equation, so this change does affect the electrode potential.
Step 2
B. the pressure of the hydrogen
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Answer
The electrode potential is also influenced by the pressure of hydrogen gas, which alters the reaction equilibria. Therefore, this change does affect the electrode potential.
Step 3
C. the surface area of the platinum electrode
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Answer
The surface area of the electrode can impact the rate of reaction but does not influence the electrode potential. Hence, this change has no effect on the electrode potential.
Step 4
D. the temperature of the acid
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Answer
The temperature of the solution can impact the reaction kinetics and equilibrium, subsequently affecting the electrode potential.
