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emantse

Chem SL Paper 3 Tips?

Hey so this is probably going to be last new topic since it's going to be last exam :')

Anyone know of any recurring topics for Options A/B?

(Or random detailed questions or tricky little questions they try to make you mess up on, etc)

And any tips or anything for paper 3 in general?

Thanks! :)

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Option B - make sure you understand the formation of triglycerides from glycerol and 3 fatty acids (and also the reverse hydrolysis reaction).

Structures of alpha and beta glucose, amylose and amylopectin are also common questions.

Solubility of vitamins, and reactions of monosaccharides to form disaccharides also spring to mind.

And of course gel electrophoresis for analysis of proteins.

Videos on all of the above here:

https://www.youtube.com/playlist?list=PLluIsqNl4jcoWhUtDaatxuO8FLKyaiQAy

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Option A: be able to understand different things that go on in EM spectrum (e.g. infrared = molecular vibrations)
be able to analyze all of infrared, mass, and NMR (including chemical shifts, and relative areas through integrator traces) graphs to deduce a structure when given the molecular formula
be able to describe chromatography methods (especially paper) using proper words like partition and adsorption and calcualte Rf values
be able to describe the roles of the components of a AA spectrometer and IR spectrometer (and sketch a calibration curve which is easy because they give you data)
Option B: sketch straight chain of glucose and fructose (as well as both alpha and beta ring structures of both glucose and fructose) - 6 diagrams in total
be able to calcualte/define iodine number (its quite simple because they ask you to do it for acids of which are in the back of the data booklet so you know how many double bonds teh specific acid has)
roles of proteins/carbs/lipids
be able to compare vitamin A C and D (C is water soluble due to ever presence of -OH groups allowing H-bonding)
micro/macro nutrient deficiences (iron = anemia, iodine = goitre, B1 = beriberi, B3 = pellagra, C = scurvy, A = night blindness/xerophthalmia, D = rickets, proteins = kwashiorkor, marasmus)
electrophoresis (and analysis of amino acids) and be able to identify where amino acids migrate (to which electrode in a gel)
describe/draw triglycerides, peptide linkages

good luck..!!!!!!

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Wow, you guys area reallly helpful. thanks :)

Started and finished reviewing all my notes today ahah XD thankfully I took Biology HL and I still remember stuff we learned in Chem class- annd all the best to you too!

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