une chem 1011 final week 12 Questions With Complete Solutions

A cathode correct answer: is an electrode where reduction occurs In an electrochemical cell based on the following reaction Zn(s) + Cu2+(aq) ⟶ Zn2+(aq) + Cu(s) Which species acts as the anode? correct answer: Zn(s) In the reaction Mg(s) + 2 Ag+(aq) ⟶ Mg2+(aq) + 2 Ag(s) What is the reduction half-reaction? correct answer: 2 Ag+(aq) + 2e- ⟶ 2 Ag(s) When paired with the anode half-reaction Co(s) ⟶ Co2+(aq) + 2 e-; E° = -0.28 V Which of the following cathode half-reactions will create a spontaneous cell reaction in the forward direction? correct answer: Sn2+(aq) + 2 e- ⟶ Sn(s); E° = -0.1375 V A redox reaction with a negative ΔG° will correct answer: have a positive ΔE°cell and will be spontaneous under standard conditions The cell reaction Zn(s) + 2 MnO2(s) ⟶ ZnO(s) + Mn2O3(s) Is representative of which type of battery chemistry? correct answer: Alkaline Galvanization correct answer: is the protection of metals with a coating of a more easily oxidized metal Using the following standard reduction potentials Mg2+ + 2 e- ⟶ Mg(s); E° = -2.372 VCd2+ + 2 e- ⟶ Cd(s); E° = -0.4030 V Calculate the standard potential for the cell reaction Mg(s) + Cd2+(aq) ⟶ Mg2+(aq) + Cd(s) correct answer: 1.969 V