Question

A) A galvanic cell Zn(s)|Zn2+(aq) || Ni2+(aq)|Ni(s) is constructed using a completely immersed Zn electrode that...

A)

A galvanic cell Zn(s)|Zn2+(aq) || Ni2+(aq)|Ni(s) is constructed using a completely immersed Zn electrode that weighs 43.2 g and a Ni electrode immersed in 503 mL of 1.00 M Ni2+(aq) solution. A steady current of 0.0555 A is drawn from the cell as the electrons move from the Zn electrode to the Ni electrode.

Which reactant is the limiting reactant in this cell?
Enter symbol

___________
How long does it take for the cell to be completely discharged? _____s

How much mass has the Ni electrode gained when the cell is completely discharged? _____g

What is the concentration of the Ni2+(aq) when the cell is completely discharged? (Assume that the limiting reactant is 100% reacted.) _____M

B)


A concentration cell is constructed in which the concentrations differ in the two half-cells. The cell consists of a La3+(aq, 0.930 M)|La(s) half-cell connected to a La3+(aq, 1.30×10-3M)|La(s) half-cell. Determine which half-cell will be the anode compartment and calculate the cell voltage.

The La3+concentration in the anode compartment will be:

a. 0.930 M

b. 1.30×10-3M

Ecell = _____V

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