8.1 An electrochemical cell is set up using an aluminium rod, Aℓ, and a gas X.
The initial emf measured under standard conditions is 2,89 V.
8.1.1 State the standard conditions under which this cell operates. (3)
8.1.2 Use a calculation to identify gas X. (5)
8.1.3 Write down the FORMULA of the reducing agent in this cell. (1)
8.1.4 Write down the half-reaction that takes place at the cathode. (2)
8.1.5 Write down the cell notation for this cell. (3)
8.2 Which container, ZINC or COPPER, will be more suitable to store an aqueous
solution of nickel ions, Ni2+?
Refer to the Table of Standard Reduction Potentials to fully explain the
answer in terms of the relative strengths of reducing agents. (4)
[18]