23 – Oxidation – Reduction Reactions
1. Determine the oxidation number of each atom in the following substances.
a. NF3
3
b. K2CO3
0
c. NO3
-
5
d. HIO4
7
2. For the following balanced redox reaction answer the following questions
2Fe+2(aq) + H2O2(aq) 2Fe3+(aq) + 2OH-1(aq)
a. What is the oxidation state of oxygen in H2O2 (it is not -2)?_____-1_____
b. What is the element that is oxidized? _____Fe_____
c. What is the element that is reduced? _____oxygen_____
d. What is the oxidizing agent? ____H2O2______
e. What is the reducing agent? _____Fe2+_____
f. How many electrons are transferred in the reaction as it is balanced? ____2______
3. For the following balanced redox reaction answer the following questions
4NaOH(aq) + Ca(OH)2(aq) + C(s) + 4ClO2(g) 4NaClO2(aq) + CaCO3(s) 3H2O(l)
