Question 1
The oxidation of Cr3+ to CrO42– can be accomplished using Ce4+ in a buffered solution. The following data were obtained:
| Relative Initial Rate | [Ce4+]0 | [Ce3+]0 | [Cr3+]0 |
| 1 | 2.0 × 10–3 | 1.0 × 10–2 | 3.0 × 10–2 |
| 2 | 4.0 × 10–3 | 2.0 × 10–2 | 3.0 × 10–2 |
| 4 | 4.0 × 10–3 | 1.0 × 10–2 | 3.0 × 10–2 |
| 16 | 8.0 × 10–3 | 2.0 × 10–2 | 6.0 × 10–2 |
Determine the order in the rate law of the species Cr3+.
Reference: Ref 12-7
◦
1◦
2◦
3◦
–1◦
–2Question 2
The question below refers to the following diagram: At what point on the graph is the activated complex present?
Reference: Ref 12-18
◦
point W◦
point X◦
point Y◦
point Z◦
None of these are correct.