Take this Quiz: A-Level Chemistry: Redox and Electrode Potentials | Zestly

Question 1

In the reaction Cl2 + 2OH- -> Cl- + ClO- + H2O, what is the oxidation state change for chlorine?

Accepted Answer

Chlorine is both oxidized to +1 and reduced to -1

Question 2

Which of the following statements regarding the Standard Hydrogen Electrode (SHE) are correct?

Accepted Answer

The SHE uses a platinum electrode to facilitate electron transfer

Question 3

Given the standard electrode potentials: E(Fe3+/Fe2+) = +0.77 V and E(Sn4+/Sn2+) = +0.15 V. What is the EMF of a cell constructed from these two half-cells?

Accepted Answer

+0.62 V

Question 4

Which of the following reactions are feasible under standard conditions? (E values: Zn2+/Zn = -0.76 V, Cu2+/Cu = +0.34 V, Ag+/Ag = +0.80 V)

Answer

Zn + Cu2+ -> Zn2+ + Cu

Answer

Cu + Zn2+ -> Cu2+ + Zn

Answer

Cu + 2Ag+ -> Cu2+ + 2Ag

Answer

Ag + Cu2+ -> Ag+ + Cu

Question 5

What is the correct balanced half-equation for the reduction of MnO4- to Mn2+ in acidic solution?

Answer

MnO4- + 4H+ + 3e- -> MnO2 + 2H2O

Answer

MnO4- + 8H+ + 4e- -> Mn2+ + 4H2O

Answer

MnO4- + 8H+ + 5e- -> Mn2+ + 4H2O

Answer

MnO4- + 4H+ + 5e- -> Mn2+ + 2H2O