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Chapter 21: Q21.3P (page 972)
Can one half-reaction in a redox process take place independently of the other? Explain
No, in a redox process, one half-reaction cannot occur on its own.
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A thin circular-disk earringin diameter is plated with a coating of gold thick from an localid="1663324101600" bath.
(a) How many days does it take to deposit the gold on one side of one earring if the current is(d of gold)?
(b) How many days does it take to deposit the gold on both sides of the pair of earrings?
(c) If the price of gold isper troy ounce (), what is the total cost of the gold plating?
Like any piece of apparatus, an electrolytic cell operates at less thanefficiency. A cell depositingfrom abath operates forwith an average current of. Ifof copper is deposited, at what efficiency is the cell operating?
Water is used to balance O atoms in the half-reaction method. Why can’tions be used instead?
Trains powered by electricity, including subways, use direct current. One conductor is the overhead wire (or “third rail” for subways), and the other is the rails upon which the wheels run. The rails are supported on supports in contact with the ground. To minimize corrosion, should the overhead wire or the rails be connected to the positive terminal? Explain
Identify those elements that can be prepared by electrolysis of their aqueous salts: fluorine, manganese, iron, cadmium.
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