Multiple Choice
What is produced at the cathode during the electrolysis of aqueous NaBr?
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20. Electrochemistry
Electrolytic Cell
Multiple Choice
In the electrolysis of AgF(aq), what is produced at each electrode?
A
Silver ions are produced at the cathode, and fluoride ions are produced at the anode.
B
Silver metal is produced at the anode, and fluorine gas is produced at the cathode.
C
Silver metal is produced at the cathode, and fluorine gas is produced at the anode.
D
Hydrogen gas is produced at the cathode, and oxygen gas is produced at the anode.
Verified step by step guidance1
Identify the species present in the aqueous solution of AgF. Since AgF dissociates completely, the main ions are Ag\(\textsuperscript{+}\), F\(\textsuperscript{-}\), H\(\textsubscript{2}\)O, and possibly H\(\textsuperscript{+}\) and OH\(\textsuperscript{-}\) from water.
Determine the possible reduction reactions at the cathode (where reduction occurs). The candidates are the reduction of Ag\(\textsuperscript{+}\) to Ag(s) and the reduction of H\(\textsuperscript{+}\) (from water) to H\(\textsubscript{2}\)(g). Compare their standard reduction potentials to see which is more favorable.
Determine the possible oxidation reactions at the anode (where oxidation occurs). The candidates are the oxidation of F\(\textsuperscript{-}\) to F\(\textsubscript{2}\)(g) and the oxidation of water to O\(\textsubscript{2}\)(g). Compare their standard oxidation potentials to identify the preferred reaction.
Based on the standard electrode potentials, conclude that silver ions (Ag\(\textsuperscript{+}\)) are reduced to silver metal (Ag) at the cathode, and fluoride ions (F\(\textsuperscript{-}\)) are oxidized to fluorine gas (F\(\textsubscript{2}\)) at the anode.
Summarize the products at each electrode: silver metal forms at the cathode, and fluorine gas forms at the anode during the electrolysis of aqueous AgF.
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