Homework Answers

What is the potential of a cell made up of Zn/Zn2+ and Cu2+/Cu, half cell at 76°c. If [Zn2+]=0.25M and [Cu2+]=0.15M

Given that Zn/Zn2+ E°=-0.76V, Cu2+/Cu E°=0.34

A zinc electrode is submerged in an acidic 0.80M Zn+ solution which are connected by salt bridge to a 1.30M Ag+ solution containing a silver electrode. Determine the initial voltage of the cell at 298k

Given that:

Zn/Zn2+ E°=0.76V

Ag+/Ag E°=0.80V

Given the Ag+/Ag=0.8V, Cu2+/Cu=0.34V Calculate the standard emf of the cell and the equilibrium constant

Given Cu2+/Cu=0.34V and Cu2+/Cu+=0.153V, calculate the equilibrium constant for the reaction Cu + Cu2+<->2Cu2+

Calculate the emf of the following voltaic cells;

(a) Pt/Fe2+(0.1M),Fe3+(0.2M)//Ag+(1M)/Ag

(b)Zn/Zn3+(10^-3M)//Ag+(10^-3M)/Ag

(c)Al/Al3+(0.1M)//Sn2+(0.37M)/Sn

Given Fe3+/Fe2+=0.77V, Zn2+/Zn=-0.76V, Sn2+/Sn=-0.14V, Ag+/Ag=0.8V, Al3+/Al=-2.56V

Calculate the emf of the following voltaic cells;

(a) Pt/Fe2+(0.1M),Fe3+(0.2M)//Ag+(1M)/Ag

(b)Zn/Zn3+(10^-3M)//Ag+(10^-3M)/Ag

(c)Al/Al3+(0.1M)//Sn2+(0.37M)/Sn

Given that Zn/Zn2+(1M)//Cu2+(1M)/Cu

(a) calculate the emf of the cell

(b) predict if the reaction is spontaneous or non spontaneous

Given that Zn/Zn2+ E=0.34V, Cu2+/Cu E=1.10V

Given that Zn/Zn+ E=-0.76V and cu+/Cu E=+0.33V (a) calculate the end of the cell (b) predict it's spontaneous or non spontaneous