CAIE A Level Chemistry 9701 · Electrochemistry
Compare the methods used to measure the standard electrode potential of (i) a metal in contact with its aqueous ions, and (ii) an ion of the same element in two different oxidation states. In your comparison, include the type of half-cell used, the role of the standard hydrogen electrode, and how the standard cell potential is obtained.
5 marks, so the mark scheme is looking for about 5 separate creditworthy points. Making the same point twice in different words earns it once.
Compare means: Give similarities or differences between two things, and say which side each point belongs to. Write each point as a pair, for example: A is X, whereas B is Y. Two separate descriptions rarely earn the marks.
Written by Markquill to follow the Cambridge International syllabus. Markquill is independent and is not affiliated with or endorsed by Cambridge International.