the structure is decoloised, (trigonal)planar molecule, the pi orbitals overlap, would include a diagram in the exam, bonding is covalent between carbon atoms, 120 .
I have not yet started chapter 1. When I finished chapter 1 and 2 fully we revise
I took that from the mark scheme, and they just put , trigonal planar, award 1 mark
They may do but it is better to know the context and put that in your answer as well. You can't learn the mark scheme and hope to get marks. :P it has the main point you need to write to get the marks. Not the actual whole complete answer.
They may do but it is better to know the context and put that in your answer as well. You can't learn the mark scheme and hope to get marks. :P it has the main point you need to write to get the marks. Not the actual whole complete answer.
1) Describe why triglycerides are insoluble in water (3)
Triglycerides are not soluble in water because they are non polar molecules. The long chains of fatty acids have many contact points so form many VDW forces as well as decrease the polarity of the compound. Therefore Triglycerides cannot form hydrogen bonds with water, and are insoluble.
Q) When Bromine reacts with Phenol, what observation would you see and what product is formed?
Triglycerides are not soluble in water because they are non polar molecules. The long chains of fatty acids have many contact points so form many VDW forces as well as decrease the polarity of the compound. Therefore Triglycerides cannot form hydrogen bonds with water, and are insoluble.
Q) When Bromine reacts with Phenol, what observation would you see and what product is formed?
Triglycerides are not soluble in water because they are non polar molecules. The long chains of fatty acids have many contact points so form many VDW forces as well as decrease the polarity of the compound. Therefore Triglycerides cannot form hydrogen bonds with water, and are insoluble.
Q) When Bromine reacts with Phenol, what observation would you see and what product is formed?
I read on a thread that you got 144 UMS in the F325 unit. Well done!
Please could you provide me any tips/advice/sources that you used in order to have done so well.
I am aiming for an A*; any advice would be appreciated.
Thanks
OFcourse, quite simple to get high mark on this exam: 1) do every past paper, under exam conditions, mark critically and analyse paper after so you understand everything on it and would get full marks if you did it again. 2)Do all the relevant legacy papers(If you want A* do all of them) 3) do the stretch and challenge questions on the CD 4)Do all the end of chapter questions dont do the things in this order though, as long as you are a normal logical person and are not stupid, you should get atleast your 135/144, A* in F325, if you do all of this
Triglycerides are not soluble in water because they are non polar molecules. The long chains of fatty acids have many contact points so form many VDW forces as well as decrease the polarity of the compound. Therefore Triglycerides cannot form hydrogen bonds with water, and are insoluble.
Q) When Bromine reacts with Phenol, what observation would you see and what product is formed?