The potential difference across the terminals of a battery of emf 12V
The potential difference across the terminals of a battery of emf 12V and internal resistance 2Ω drops to 10V when it is connected to a silver voltameter. Find the silver deposited at the cathode in half an hour. Atomic weight of silver is 107.9g/mole.
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For potential drop, t = 30 min = 180 sec
Vi = Vf + iR => 12 = 10 + 2i => i = 1 Amp
m = Zit = (107.9)/(96500) x 1 x 30 x 60 = 2.01g ≈ 2g
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