Cr 2 O 7 + 6Fe 2+ + 14H + → 2Cr 3+ +6Fe 3+
CHEMISTRY
JAMB 1990
Cr2O7+ 6Fe2++ 14H+ → 2Cr3+ +6Fe3+ + 7H2O. In the above , the oxidation number of chromium changed from?
- A. +7 to +3
- B. +6 to +3
- C. +5 to +3
- D. -2 to +3
Correct Answer: A. +7 to +3
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