Deduce the oxidizing and reducing agents in the reaction of potassium bromide with chlorine.

Table shows reactions involving aqueous solutions of halogens with aqueous potassium iodide solution. Copy and complete the table, and in each case:

a. State whether a reaction will occur or not.

b. Identify the colour of the halide solution after reaction.

c. Deduce the balanced equation for any reaction that occurs.

State the cell diagram for the cell.

Write half-equations for the reactions occurring at the cathode and the anode.

Identify a suitable compound that may be used in the salt bridge.

Identify the direction of the movement of electrons and ion flow, both in solution and in the salt bridge.

Explain why the cation and anion of the salt used in the salt bridge should have approximately the same size and charge. Identify using e potassium chloride is the most common electrolyte for the salt bridge, the ionic radii of ${\mathrm{K}}^{+} (138 \mathrm{pm})$ and ${\mathrm{Cl}}^{-} (181 \mathrm{pm})$.

Cotton wool is often used at the tips of the salt bridge. Suggest the function of this.