Question

What is the correct representation of reaction occurring when $HCl$ is heated with $MnO_2$ ?

• A. $MnO_{4}^- + 5Cl^{-} + 8H^{+} \to Mn^{2+} + 5Cl_{2} + 5H_{2}O$
• B. $MnO_{2} + 2Cl^{-} + 4H^{+} \to Mn^{2+} + Cl_{2} + 2H_{2}O$
• C. $2MnO_{2} + 4Cl^{-} + 8H^{+} \to Mn^{2+} + Cl_{2} + 2H_{2}O$
• D. $MnO_{2} + 4HCl \to MnCl_{4} + Cl_2 + H_{2}O$

Answer 1

Answer: (B)

$MnO_{2} + 4HCl \to MnCl_{2} + Cl_{2} + 2H_{2}O$
or in ionic form
$MnO_{2} + 2CI^{-} + 4H^{+} \to Mn^{2+} + Cl_{2} + 2H_{2}O$