Hydrolysis

Hi,

Can i have some help on this A Level Chemistry question please. I really don't understand the answer. And what topic does this count as? I've attached the question and markscheme (from PMT). Thanks.

Hi,

Can i have some help on this A Level Chemistry question please. I really don't understand the answer. And what topic does this count as? I've attached the question and markscheme (from PMT). Thanks.

Identify the amide bond, break it to NH2 and COOH and redraw structure
Than consider the condition:
Remember NH2 is a base, so will accept H+ in acid condition
Remember COOH is a acid, so will form a salt under alkaline condition

From my understanding, hydrolysis means the amide bond is split, which forms two molecules. H+ is added to the molecule containing the nitrogenous part of the amide group to form the amine group and OH- to the other to form the carboxylic acid group. As the conditions are acidic, the amine will then react with the acid, forming an ammonium salt. The carboxylic acid doesn't change as it won't react with the acid. This leaves the products as an ammonium salt and a carboxylic acid, which is what is on the mark scheme.
I did OCR B Chemistry and I think this was in the Colour By Design unit, as part of organic reactions? I could be wrong about that, I was always confused about which unit was what exactly.

Thanks for explaining! I understand everything now, but where does the OH- come from to form carboxylic acid? Cause wasn't it only in acidic conditions in the question?

Hydrolysis means water is involved to actually initiate the splitting of the bond (I think it can be other small molecules too, not important here, but just in case that gets mentioned in any of your future lessons) It's the opposite of a condensation reaction where a bond is formed and so is water, if you know about condensation reactions?

(the edit was just trying to get the attachment to work, apologies if it doesn't, I haven't attached pictures to posts before)