ElectrochemistryStandard Cell Potential26Choose the best answerGiven: Ag⁺ + e⁻ → Ag E° = +0.80 V Al³⁺ + 3e⁻ → Al E° = −1.67 V The standard cell potential is:A+2.47 VB+0.87 VC−0.87 VD+5.81 V Like 0 Discuss 0Share
ElectrochemistryStandard Hydrogen Electrode27Choose the best answerStandard conditions for the hydrogen electrode include:AH₂ at approximately 1 bar pressureBUnit activity of H⁺CTemperature commonly specified as 298 KDAll of these Like 0 Discuss 0Share
ElectrochemistryStandard Hydrogen Electrode28Choose the best answerSHE acts as an anode with Cu but as a cathode with Zn because:AZn has a lower E°red than H⁺/H₂, while Cu has a higher E°redBZn has a higher E°red than CuCCu has a lower E°red than ZnDHydrogen always acts only as an anode Like 0 Discuss 0Share
ElectrochemistryElectron Transfer and Oxidation Number Change29Choose the best answerWhich change involves transfer of five electrons per metal atom?AMnO₄²⁻ → MnO₂BCrO₄²⁻ → Cr³⁺CMnO₄⁻ → Mn²⁺DCr₂O₇²⁻ → 2Cr²⁺ Like 0 Discuss 0Share
ElectrochemistryElectrochemical Series30Choose the best answerThe electrochemical series is based on electrode potentials measured relative to the:ApH scaleBArrhenius scaleCStandard hydrogen electrodeDpOH scale Like 0 Discuss 0Share