GKFix MCQ Question

Which of the following best explains the relatively low E°(M3+/M2+) value for Chromium (Cr)?

• A. The instability of the d4 configuration of Cr2+
• B. The high hydration energy of Cr3+
• C. The relatively stable d3 configuration of Cr3+ compared to Cr2+
• D. The low third ionisation energy of Cr