Which of the following statements is TRUE? Select one: O a. The standard hydrogen electrode uses H2(g, 1 bar) and H*(aq, 0.1 M) O b. The standard hydrogen electrode oxidises a Pt electrode in an aqueous acidic solution Oc. The standard hydrogen electrode reduces a Pt electrode in an aqueous acidic solution O d. The standard hydrogen electrode can only be used to produce H2(g) from H*(aq). The reverse reaction is not possible O e. The potential of the standard hydrogen electrode is always zero

An electrochemical cell uses Ag and Zn as electrodes. Based on the reduction potentials, the (blank) electrode is where the reduction will occur and it is called the (blank) a.Ag, cathode b.Zn, anode c.Ag, anode Based on the reactions below, which is the stongest reducing agent? +1.22 V MnO2(s) + 4H+(aq) + 2e- → Mn2+(aq) + 2H2O(1) +0.61 V Hg2SO4(s) + 2e- → 2Hg(1) + SO4 2- (aq) -0.95 V SnO2(s) + 2H2O() + 4e-→ Sn(s) + 40H-(aq) -1.48 V Cr(OH)3(s) + 3e- → Cr(s) + 3OH-(aq) a.Hg2SO4 b.Mn02 c.Cr d.Sn e.Hg Identify the strongest oxidizing agent from the following half-reactions. The standard reduction potentials are listed. +1.22 V Mn02(s) + 4H+(aq) + 2e- → Mn2+(aq) + 2H20(1) +0.61 V Hg2SO4(s) + 2e- → 2Hg(1) + SO4 2-(aq) -0.95 V SnO2 (s) + 2H2O() + 4e- Sn(s) + 40H-(aq) -1.48 V Cr(OH)3(s) + 3e- Cr(s) + 3OH- (aq) a. MnO2 b.Hg2SO4 c.Sn d.Hg e.Cr

Name: NetID: 21. Electrolysis can be a convenient way to remove a metal from a solution of multiple ions. What mass of aluminum metal (26.982 g mol-¹) can be isolated from a solution of Al2O3 using a current of 125 A over a 12 hour period? A: 503.3

A cell utilizes the following reaction and operates at 298 K: 2H+(aq) + Zn(s) → Zn2+(aq) + H2(g) a.What is the emf of this cell under standard conditions? (Look up E° values). b. What is the emf of this cell when [Zn2+] = 0.050 M, PH2 = 0.25 atm, and the pH = 4.00.(Use pH toget [H+]