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Originally Posted by SilverStar
ACTUALLY, in a galvanic or electrolytic cell (yeah for AP Chem + AP Physics) the positive ions flow also.
Current flows in opposite directions for positive ions than for electrons. Current never travels even close to the speed of light (remember, current is in Columbs per second, not meters per second, so that's an incongruous dimensional comparison). EMF travels close to the speed of light. And yes, you can find resistance using the following equation:
R=rho * length/ Area
Just replace "rho" with the resistivity of the ion/wire combo.
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Calarification for my earlier post (above):
The formula for resistance I gave is only applicable for metal wires. In metal wires you'll probably never have positive ions moving. Since pos. ions can only move in solutions, gel, and salt bridges, there is no valid "length" or "area" of the solution.