1a. For the voltaic cell below, draw a functioning cell. Your diagram should include:
Components:
two beakers
anode
a salt bridge
cathode
wire
Half-Rxn at cathode and anode
voltmeter
Direction of electron movement
Direction of cation and anion movement
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b. If this cell was to run for a day. Which metal will increase in mass and why?
c. What is a salt bridge and what is its purpose?
2. A student has been provided with the following materials.
2 mol/L iron (II) nitrate
Strip of copper metal
beakers
2 mol/L chromium (II) nitrate
Strip of iron metal
Salt bridge
2 mol/L lead (II) nitrate
Strip of chromium metal
voltmeter
2 mol/L copper (II) nitrate
Strip of lead metal
Connecting wire
2 mol/L tin (II) nitrate
Strip of tin metal
a. Draw a fully assembled cell including all components (see question 1), that would create the maximum voltage possible.
b. Label the anode and cathode on your diagram
c: write the half-reactions that occur at the cathode and anode
d: calculate the cell potential of this cell (show all work)
3. Hydrogen fuel cells are used on the space shuttle. These cells run on hydrogen ions, hydrogen gas and oxygen gas.
a) Write two most likely half reactions, and net reaction that will take place in the hydrogen fuel cell.
b) Calculate the electric potential difference for this reaction. (show all work)
4. When chlorine gas is reduced to produce chlorine ions, and an electric potential difference of 1.49 V is produced. During this process, an unknown metal undergoes oxidation.
a) What is the reduction potential of the unknown metal?
b) The identity of the unknown metal is:
5. Suppose that the standard reference cell was changed from hydrogen to bromine.
a) Due to this change, the new reduction potential of the chorine half-cell would now be ____________V (show all work)
b) Due to this change, the new reduction potential of the zinc half-cell would now be ____________V (show all work)
c) Using calculations, show that net cell potential for the chlorine-zinc half-cell would be the same, regardless of which standard cell is used. Show all work.
6. Compare and contrast electrolytic and voltaic cells by filling out the table below:
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