Question 1
Zinc reacts with copper(II) sulfate solution: Zn(s) + Cu²⁺(aq) → Zn²⁺(aq) + Cu(s). Which species is the oxidising agent?
Original questions for every area, with worked answers on the multiple choice and calculations, and feedback on your written answers.
| Multiple choice | Section 1 style, worked or timed |
|---|---|
| Section 2 questions | Calculations, choices and written parts |
| Open-ended questions | 3 marks, one written answer |
| Written answers | Read against the mark points, with your next step |
Multiple-choice questions show the working after each answer. In Section 2 questions a calculation is checked on its value and its significant figures, and Mia reads each written answer against its mark points and says what it covers and what to add next. She never shows a mark or writes the answer for you.
| Concentration (mol l⁻¹) | Reaction time (s) |
|---|---|
| 0.10 | 120 |
| 0.20 | 60 |
| 0.40 | 30 |
No. Every question here is original, written for the current course specification.
No. The assignment is done in school; this course prepares you for the question paper.