A level Chemistry PAG 6.3 Preparation of methyl 3-nitrobenzoate

I am doing PAG 6.3 Preparation of methyl 3-nitrobenzoate and am just a bit confused with the analysis question. Does anyone have any idea? Thank you so much!

At school, you should of used a melting point apparatus to measure the melting point of the sample of methyl 3-nitrobenzoate and you would find a 'known' value (basically what you would of expected it to be - which is 78^oC) and you would compare your melting point to the 'known value' (basically, the closer the more pure the substance is, and if the melting point you got is nowhere near, you could explain that the sample could be contaminated or there may still be excess acid, etc)

You would complete a risk assessment, here's what you need:
Use CLEAPSS or a similar source to find the information and reference it - because it's OCR, Harvard referencing is the default.
Look at the concentrations you have, mention if they're hazardous, corrosive, etc and what safety measures you should take - it's best to put this in a table.

You would need to ask your teachers to access to the CLEAPSS sheet to get the risk assessment information.

Thanks so much!! Legend