the following electrochemical cell Cu(s)|Cu2 + (aq, 0.0155 M)||Ag + (aq, 2.50 M)
ID: 840875 • Letter: T
Question
the following electrochemical cell Cu(s)|Cu2 + (aq, 0.0155 M)||Ag + (aq, 2.50 M)|Ag(s) write the net cell equation. Phases are optional. Do not include the concentrations. The voltage generated by the zinc concentration cell described by, Zn(s)|Zn2 + (aq, 0.100 M)||Zn2 + (aq, ? M)|Zn(s) is 19.0 mV at 25 degreeC. Calculate the concentration of the Zn2 + (aq) ion at the cathode. Gallium is produced by the electrolysis of a solution obtained by dissolving alliums oxide in concentrated NaOH(aq). Calculate the amount or Ga(s) that can be deposited from a Ga(lll) solution by a current of 0.730 A that flows for 40.0 min. A current of 3.07 A is passed through a Pb(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 7.10 g of lead?Explanation / Answer
A. Reaction: Cu +Ag+ --- > Ag +Cu2+
Now, E0Cell=ECuICu2+ -EAgIAg+
=-0.34-0.80
=1.14 V
?G0=-nFE0
n=2 as 2e- are transferred
=-2*96485*1.14
=-219.99 kJ/mol
Ecell=E0cell
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