Describe the best way ryan can increase the rate of dissolving of lead (ii) chloride in a solution.

You can increase the rate of dissolving by either: increasing surface area (powdered form of solute), increased agitation or by manipulating the temperature. The temperature method is quite tricky. Generally, solvation rate increases at higher temperatures. But there are some exceptions to the rule. However, lead chloride is not one of these. Thus, increase the temperature for greater solvation rate.

True, the standard unit for volume is liters which can be represented by either a lower case "l" or a capital "l"