⚡ Show all working — the AI marks against the AQA mark scheme. Method marks awarded for correct working even if the final answer is wrong.
1 markOIL RIGAQA 8462 style
A zinc atom loses two electrons to form Zn2+. Which statement is correct?
A Zinc is reduced because it loses electrons
B Zinc is oxidised because it loses electrons
C Zinc is the reducing agent and is also reduced
D Zinc gains electrons so it is oxidised
3 marksHalf equationsAQA 8462 style
In the electrolysis of copper(II) sulfate solution with copper electrodes, write half equations for: (a) what happens at the cathode, and (b) what happens at the anode. (3 marks)
Hint: Cathode = reduction = electrons gained (left side). Anode = oxidation = electrons lost (right side). With Cu electrodes, Cu dissolves at anode and deposits at cathode.
+30 XP
1 markOxidising agentAQA 8462 style
In the reaction Mg + CuSO4 → MgSO4 + Cu, which species is the oxidising agent?
A Magnesium (Mg)
B Cu2+ ions
C Sulfate ions (SO42-)
D Magnesium sulfate (MgSO4)
3 marksDisplacement redoxAQA 8462 style
Iron filings are added to blue copper sulfate solution. Describe what you would observe and explain the observations in terms of electron transfer. (3 marks)
Hint: Observe: blue fades, copper deposits. Explain: iron loses electrons (oxidised) → iron ions form. Copper ions gain electrons (reduced) → copper metal.