A sample of silver is to be purified by electro-refining. This will separate the silver from an impurity of gold. The impure silver is made into an electrode. Which of the following is the best way to set up the electrolytic cell?
A.
an impure silver cathode and an inert anode(B) an impure silver cathode and a pure gold anode
B.
an impure silver cathode and a pure gold anode
C.
a pure silver cathode with an impure silver anode
D.
a pure gold cathode with an impure silver anode
Exam No：AP Chemistry Problem Set 4 Year：2024 Question No：APChemistry2024AP0144
Answer:
D
Knowledge points:
9.8 Galvanic (Voltaic) and Electrolytic Cells
Solution:
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