Redox Reactions

Topics in this chapter

• Oxidation Numbers and Exceptions
• Redox Reaction Types
• Acidic and Basic Redox Balancing
• N-Factor, Equivalents, and Titrations
• Electrochemical Cells and Oxidizing Power

Cheat sheet

Practice questions

1. Question 1Q-6DA7D9

   What is the oxidation state of sulfur in H2SO5 (Caro's acid)?

   1. A.+8
   2. B.+6
   3. C.+7
   4. D.+4
   See the answer and solution
2. Question 2Q-85F13F

   In the reaction: $3Cl_2 + 6OH^- \rightarrow ClO_3^- + 5Cl^- + 3H_2O$, the chlorine is:

   1. A.Only oxidized
   2. B.Only reduced
   3. C.Both oxidized and reduced (disproportionation)
   4. D.Neither oxidized nor reduced
   See the answer and solution
3. Question 3Q-C8A89B

   What is the n-factor of $KMnO_4$ when it acts as an oxidizing agent in a strongly alkaline medium to form $K_2MnO_4$?

   1. A.1
   2. B.3
   3. C.5
   4. D.7
   See the answer and solution
4. Question 4Q-590C44

   Which of the following compounds has the highest oxidation state for the underlined element: $\underline{Cr}O_2Cl_2$, Mnar{O}_4^-, $\underline{Fe}_0.95O$, $\underline{P}H_3$?

   1. A.CrO2Cl2
   2. B.MnO4-
   3. C.Fe0.95O
   4. D.PH3
   See the answer and solution
5. Question 5Q-DA7DA1

   Balance the following equation in acidic medium: $MnO_4^- + Fe^{2+} + H^+ \rightarrow Mn^{2+} + Fe^{3+} + H_2O$. What is the stoichiometric coefficient of $H^+$?

   1. A.8
   2. B.5
   3. C.6
   4. D.4
   See the answer and solution