oh well, we haven't even finish the syllabus and it's not far till the exam still, it's looking good, nothing too diffcult difficult but once again, it will be my top priority amongst my other subjects
oh well, we haven't even finish the syllabus and it's not far till the exam still, it's looking good, nothing too diffcult difficult but once again, it will be my top priority amongst my other subjects
I checked to see if there was another thread on this, I couldn't find one.
We haven't finished this unit either. I agree, there is nothing that is very difficult.
We've just about finished the unit but feel like I need a lot of revision until I'm prepared for the exam.
The unit is one which needs plenty of preparation, especially for Section C of the exam. It's usually a question on finding the identity of organic compounds from different evidence, i.e. NMR.
Was just tryna get the acid/base stuff in my head.. Do we need to know the indicators by memory or are they given?
Well I think you just gotta know which indicators are used for the 3 different types of titration curves, e.g. for strong acid weak base ---> methyl orange etc. But if they give you a titration curve, and ask you to refer to the data booklet and ask you why a specific indicator is not appropriate, then you just gotta talk about it in terms of the vertical length pH and how it doesnt cover it, therefore it cant be used.. etc. Main two you should know are: Methyl orange and phenolphthalein
The unit is one which needs plenty of preparation, especially for Section C of the exam. It's usually a question on finding the identity of organic compounds from different evidence, i.e. NMR.
That's going to seperate the sheeps from the goats, my chem teacher says
NMR IR mass spec, it's not too difficult but when they twist it in the exam and give you loads of data, it becomes a nightmare
The unit is one which needs plenty of preparation, especially for Section C of the exam. It's usually a question on finding the identity of organic compounds from different evidence, i.e. NMR.
I don't know how to prepare though. There's only so many exam papers for the new spec.
Hey. The only mechanism that will be tested and is usually tested is the nucleophillic addition with HCN. This always comes up so thoroughly revise it
if it asks for why the addition of HCN to an asymmetrical ketone/aldehyde is not optically active, make sure you state that hcn can attatck from above or below, and that produces two optical isomers (that cancel each other out).
if it asks for why the addition of HCN to an asymmetrical ketone/aldehyde is not optically active, make sure you state that hcn can attatck from above or below, and that produces two optical isomers (that cancel each other out).
YUP! Plus, both enantiomers can rotate plane polarised light, although that's not needed