Eduprobe
Question:
When KMnO4 reacts with KBr in alkaline medium gives bromate ion. Then oxidation state of Mn changes from +7 to:
+3
+2
+6
+4
Solution:
+72MnO₄⁻+Br⁻+H₂O→+42MnO₂⁻+BrO₃⁻+2OH⁻
∴Oxidation state changes to +4.
+3
+2
+6
+4
+72MnO₄⁻+Br⁻+H₂O→+42MnO₂⁻+BrO₃⁻+2OH⁻
∴Oxidation state changes to +4.