Long answer·Standard multi-step (3/5)·No calculator
Difficulty guide
The label describes the problem, not your ability.
1/5 - Foundational
Warm-up setup; checks one basic idea.
2/5 - Routine exam skill
Normal syllabus skill; usually one main rule or interpretation.
3/5 - Standard multi-step
Exam-style problem with multiple steps or a common trap.
4/5 - Hard exam skill
High-end exam problem; combines methods carefully.
5/5 - Challenge
Stretch problem beyond normal exam pressure.
Question
In alkaline medium, construct the net ionic equation for converting to while itself forming .
Total: 8 marks
(a) Write the balanced reduction half-reaction. (3 marks)
(b) Write the balanced oxidation half-reaction. (2 marks)
(c) Combine the half-reactions. (3 marks)
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