1. The electrolysis of water is often done with a small amount of sulfuric acid

Question

1. The electrolysis of water is often done with a small amount of sulfuric acid added to the water. What is
the role of the sulfuric acid?

2. A) Write the half-reactions and overall cell reaction represented by FeFe2+ Ag+Ag.
B) Sketch the voltaic cell, label the anode and cathode, and indicate the direction of electron flow.

3. A) Sketch the cell illustrating an electrolytic cell for electroplating nickel onto a piece of steel. The
electrodes are immersed in a solution of NiSO4(aq). Label the anode and cathode, and indicate the
direction of electron flow.
B) Write the half-reactions and overall cell reaction.

Explanation / Answer

1) The ions from H2SO4 increase the conductivity of the water so that electrolysis can proceed at a reasonably fast pace. Without it, the production of H2 and O2 would be very slow.

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