nitration of benzene derivative (ch6) -please help Watch

CocoBandicoot
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For my coursework we carried out a 2 part experiment And I'm stuck on some of the evaluation questions.

preparation 1: Nitration

I converted methylbenzene carboxylate (methylbenzoate) to methyl-3-nitrobenzenecarboxylate by adding sulphuric and nitric acid and keeping the temperature below 10°c, then pouring the solution over ice, filtering and washing it then recrystalising it from hot methanol.

preparation 2: Hydrolysis.

I converted the methyl-3-nitrobenzenecarboxylate to 3-nitrobenzenecarboxylic acid by refluxing it, mixibg in concentrated hydrochloric acid then cooling it, filtering it, then recrystalising it.

1) suggest why the yeilds in preparation 2 are higher than in preparation 1.

2) state the nature of the initial product of the reaction of methyl-3-nitrobenzene carboxylate with aqueous sodium hydroxide, and explain why this is substantially more soluable in watrr than the 3-nitrobenzenecarboxylic acid finally obtained. Explain also why it is here in preparation 2, necessary to acidify the reaction mixture.

3)outline a simple technique whereby you could confirm experimentally that the mr value for 3-nitrobenzene carboxylic acid was approximatley that hiven in your instruction sheet. (Think the answers titration but not sure what to write).
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TSR Jessica
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Sorry you've not had any responses about this. Are you sure you’ve posted in the right place? Posting in the specific Study Help forum should help get responses.

I'm going to quote in Puddles the Monkey now so she can move your thread to the right place if it's needed. :yy:

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CocoBandicoot
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Thank you, I didn't know how to put in a forum on my mobile.
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