In general, in the discussion section of a scientific report, you summarize the findings and comment on whether you think your findings are correct. Does the empirical formula that you came up with make sense? What are the advantages and disadvantages of the methods you used? What sources of error could have caused your results to be wrong? Are there any improvements you can make? For some experiments, you can also discuss the significance of your findings in your report (for example, tell us why you are finding the empirical formula of lead iodide in the first place?).