Redox Reaction By Oxidation Number Method 01 Ques3
Question:
In the reaction $Cr_2O_7^{2-} + Fe^{2+} \rightarrow Cr^{3+} + Fe^{3+}$ in an acidic medium, what is the correct coefficient of $Fe^{2+}$ after balancing?
Options:
A) 6
B) 7
C) 5
D) 3
Show Answer
Answer: a
Explanation:
A) Correct, the balanced equation is $Cr_2O_7^{2-} + 6Fe^{2+} + 14H^+ \rightarrow 2Cr^{3+} + 6Fe^{3+} + 7H_2O$.
B) Incorrect, 7 would result in incorrect balancing.
C) Incorrect, 5 does not account for proper atom and charge balance.
D) Incorrect, 3 is insufficient for balancing the reaction.
BETA
