Question

Which of the following equations is a balanced one?

• A. $5 BiO^{-}_{3} + 22H^{+} + Mn^{2+} \to 5Bi^{3+} + 7H_{2}O + MnO^{-}_{4}$
• B. $5 BiO^{-}_{3} + 14H^{+} + 2Mn^{2+} \to 5Bi^{3+} + 7H_{2}O + 2MnO^{-}_{4}$
• C. $2 BiO^{-}_{3} + 4H^{+} + Mn^{2+} \to 2Bi^{3+} + 2H_{2}O + MnO^{-}_{4}$
• D. $6 BiO^{-}_{3} + 12H^{+} + 3Mn^{2+} \to 6Bi^{3+} + 6H_{2}O + 3MnO^{-}_{4}$

Answer 1

Answer: (B)

$5 BiO^{-}_{3} + 2Mn^{2+} \to 5 Bi^{3+} + 2MnO^{-}_{4}$
$H$ and $O$ balance
$5BiO^{-}_{3} + 2Mn^{2+}+ 14H^{+} \to 5B^{3+}_{1} + 2MnO^{-}_{4} + 7H_{2}O$