Two different electrolytic cells are constructed to electroplate two identical objects based on the half-reactions given in the table above. An object will be plated with a certain number of moles of Au in one cell, and in the other cell another object will be plated with the same number of moles of Ag in the same amount of time. Which of the following mathematical relationships can be used to determine how much more current is needed to electroplate an object with Au than to electroplate it with Ag? Sub

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Question 5D
Half-Reaction
Standard Reduction Potential, E (V)
Ag* (aq) + e- → Ag(s)
+0.80
Au (aq) + 3 e- → Au(s)
+1.50
Two different electrolytic cells are constructed to electroplate two identical objects based on the half-reactions given in the table above. An object will be plated with a certain number of moles of Au in one
cell, and in the other cell another object will be plated with the same number of moles of Ag in the same amount of time. Which of the following mathematical relationships can be used to determine how much
more current is needed to electroplate an object with Au than to electroplate it with Ag?
Sub
The difference in standard reduction potential of Aut and Ag* is 0.70 V.
Three times more electrons are needed to reduce Au(aq) to Au(s) than are needed to reduce Ag* (ag) to Ag(s)
B
AG" is more negative for the reduction of Au+ (aq) to Au(s) than for the reduction of Ag* (aq) to Ag(s).
196.97
is
The molar-mass ratio of 4Au
107.87
Ag
Transcribed Image Text:apclassroom.collegeboard.org I LOW BATTERY CollegeBoard AP Classroom Unit 9 Progress Check: MCQ Your Mac will sleep soon unless plugged into a power outlet. A UPDATES AVAILABLE Do you want to install the updates now? Question 5D Half-Reaction Standard Reduction Potential, E (V) Ag* (aq) + e- → Ag(s) +0.80 Au (aq) + 3 e- → Au(s) +1.50 Two different electrolytic cells are constructed to electroplate two identical objects based on the half-reactions given in the table above. An object will be plated with a certain number of moles of Au in one cell, and in the other cell another object will be plated with the same number of moles of Ag in the same amount of time. Which of the following mathematical relationships can be used to determine how much more current is needed to electroplate an object with Au than to electroplate it with Ag? Sub The difference in standard reduction potential of Aut and Ag* is 0.70 V. Three times more electrons are needed to reduce Au(aq) to Au(s) than are needed to reduce Ag* (ag) to Ag(s) B AG" is more negative for the reduction of Au+ (aq) to Au(s) than for the reduction of Ag* (aq) to Ag(s). 196.97 is The molar-mass ratio of 4Au 107.87 Ag
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