Mno4-+br- =mn2+ +br2
Answers
Answer:
Redox reaction or Oxidation-reduction reaction : It is defined as the reaction in which the oxidation and reduction reaction takes place simultaneously.
Oxidation reaction : It is defined as the reaction in which a substance looses its electrons. In this, oxidation state of an element increases. Or we can say that in oxidation, the loss of electrons takes place.
Reduction reaction : It is defined as the reaction in which a substance gains electrons. In this, oxidation state of an element decreases. Or we can say that in reduction, the gain of electrons takes place.
In the half reaction method, the number of atoms in each half reaction and number of electrons should be balanced.
The half reactions in the acidic medium are :
Reduction half reaction : MnO_4^-+8H^++5e^-\rightarrow Mn^{2+}+4H_2OMnO
4
−
+8H
+
+5e
−
→Mn
2+
+4H
2
O
Oxidation half reaction : 2Br^-\rightarrow Br_2+2e^-2Br
−
→Br
2
+2e
−
In order to balance the electrons, we multiply the reduction reaction by 5 and oxidation reaction by 2 then added both equation, we get the balanced redox reaction.
Thus, the balanced redox reaction will be,
2MnO_4^-+16H^+10Br^-\rightarrow 2Mn^{2+}+5Br_2+