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Which of the following is the correctly balanced equation for the reaction of potassium permanganate with hydrochloric acid described in the notes?
A$\mathrm{KMnO_4 + 8HCl \rightarrow KCl + MnCl_2 + 4H_2O + 2Cl_2}$
B$\mathrm{2KMnO_4 + 16HCl \rightarrow 2KCl + 2MnCl_2 + 8H_2O + 5Cl_2}$
C$\mathrm{2KMnO_4 + 10HCl \rightarrow 2KCl + 2MnCl_2 + 5H_2O + Cl_2}$
D$\mathrm{KMnO_4 + 16HCl \rightarrow KCl + MnCl_2 + 8H_2O + 5Cl_2}$
Answer & Solution
Correct answer: B. $\mathrm{2KMnO_4 + 16HCl \rightarrow 2KCl + 2MnCl_2 + 8H_2O + 5Cl_2}$
The balanced equation is $\mathrm{2KMnO_4 + 16HCl \rightarrow 2KCl + 2MnCl_2 + 8H_2O + 5Cl_2}$. It balances K, Mn, O, H, and Cl on both sides. The other options leave one or more elements unbalanced.
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