Past Papers with Detailed Answers
(2025/2026 Edition)
1. Hg2 2+ - ANSWER ✔ gray
2. How do you get reactive rate - ANSWER ✔ divide
reaction rates by the smallest reaction rate
3. Rule 1 of copper redox cycle - ANSWER ✔ neutral
elements ox# is equal to 0. (ex. Cu, S, Mg, O2)
4. Rule 2 of copper redox curve - ANSWER ✔ simple
ion ox# is equal to the charge (ex. s^-2 = -2 , F^- = -1
)
5. Rule 3 of copper redox curve - ANSWER ✔ In
compound ox# is H=+1, F=-1, O=-2