When electricity (the flow of electrons) is passed through asolution, it causes an oxidation-reduction (redox) reaction tooccur. If the solution contains a metal cation such as Ag+, theflow of electrons will reduce the silver ion, causing solid silverto plate onto the electrode. The amount of metal plated depends onthe number of electrons passed.
The total charge of a mole of electrons is 96,485 coulombs (C)and
1ampere(A)=1coulomb/second(C/s)
A) What mass of Cu(s) is electroplated by running 27.0 A ofcurrent through a Cu2+(aq) solution for 4.00 h?
B) How many minutes will it take to electroplate 34.1 g of goldby running 5.00 A of current through a solution of Au+(aq)?
