Question

1. Identify the oxidant and reductant in the
following ionic equation and balance it
using oxidation number method (3)
MnO4 + Br+H+2)
(aq)
Mnaq + Br20 + ,00​

Answer 1

Answer:

Explanation:

Step 1. Write down the unbalanced equation ('skeleton equation') of the chemical reaction. All reactants and products must be known. For a better result write the reaction in ionic form.

 MnO4- + Br- → MnO2 + BrO3- + OH-  

Step 2. Separate the process into half reactions. A redox reaction is nothing but both oxidation and reduction reactions taking place simultaneously.

a) Assign oxidation numbers for each atom in the equation. Oxidation number (also called oxidation state) is a measure of the degree of oxidation of an atom in a substance (see: Rules for assigning oxidation numbers).

Mn+7O-24- + Br-1- → Mn+4O-22 + Br+5O-23- + O-2H+1-