Chapter 21: Q21.79P (page 975)
Why do steel bridge-supports rust at the waterline but not above or below it?
There isn't enough oxygen below the waterline, and there isn't enough water above the waterline for rust to form.
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A voltaic cell consists of a standard hydrogen electrode in one half-cell and a half-cell. Calculate when is V
A voltaic cell is constructed with anhalf-cell and ahalf-cell. The zinc electrode is negative.
(a) Write balanced half-reactions and the overall reaction.
(b) Diagram the cell, labeling electrodes with their charges and showing the directions of electron flow in the circuit and of cation and anion flow in the salt bridge.
(a) How many minutes does it take to form 10.0 Lof measured ataand from water if a current of 1.3 A passes through the electrolytic cell?
(b) What mass of forms?
How is a standard reference electrode used to determine unknown half-cell values?
What does a negative cell indicate about a redox reaction? What does it indicate about the reverse reaction?
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