Chemistry Predictions/Thoughts (1 Viewer)

[ManifestationIsKey]

The titration data couldn’t actually be used to distinguish between Y and Z right. I just used it as a confirmation, after using the 2 other data to determine the compound identities.

Yeah, you needed to show that since Z only forms 1 product it is symmetrical and since number 3 is symmetrical that is Z and since Y forms 2 products it is asymmetrical and thus it is 1. The Titration data was only to split between X and (Y and Z). For X you could have just said that since it doesn't decolourise it doesn't have a C=C and then use the titration data to show that the MM matches the titre volume (or vice versa).

 

[randomuser246]

lol i just drew the two possible structures for E and looked at one of the peaks and showed how it only exists in one of them. I thought about adding the titration stuff for all the compounds but really didn't want to bother so i didnt

I drew the two options as well and then eliminated

 

[lidess23]

lol i just drew the two possible structures for E and looked at one of the peaks and showed how it only exists in one of them. I thought about adding the titration stuff for all the compounds but really didn't want to bother so i didnt

did you have to talk about all hnmr data points. You only needed the last two ngl, but now I’m worried I lost marks there

 

[herbimycin]

Yeah, you needed to show that since Z only forms 1 product it is symmetrical and since number 3 is symmetrical that is Z and since Y forms 2 products it is asymmetrical and thus it is 1. The Titration data was only to split between X and (Y and Z). For X you could have just said that since it doesn't decolourise it doesn't have a C=C and then use the titration data to show that the MM matches the titre volume (or vice versa).

yeah thats pretty much what i did. i just hope they don't say you have to go over the titration bit for full marks bc you didn't need it and so i didn't use it

 

[appleali]

did you have to talk about all hnmr data points. You only needed the last two ngl, but now I’m worried I lost marks there

nah pretty sure you didnt but i had time so i was like why not.

 

[appleali]

yeah thats pretty much what i did. i just hope they don't say you have to go over the titration bit for full marks bc you didn't need it and so i didn't use it

hmmm i wouldve used all data but i think itll be fine as long as it was elaborate enough

 

[herbimycin]

did you have to talk about all hnmr data points. You only needed the last two ngl, but now I’m worried I lost marks there

i just talked about 1 (i think the one with 6 H nuclei in it and was a doublet). it only existed in one of the two possible molecules i think

 

[user1207]

Damn nice, gunning for sr? I'm hoping for 92+ depending on how they mark the 7 marker and my writing

same for me

 

[user1207]

mcq was not too bad right?

yea i thought it was pretty good

 

[scoobie29]

Guys , if i put two methods in that last question and one of them is right but i didn’t cross out the wrong one will they be sweeties and let me have the mark

 

[hughjanus_]

Guys , if i put two methods in that last question and one of them is right but i didn’t cross out the wrong one will they be sweeties and let me have the mark

no chance

 

[help2024]

guys was structure A 1-bromopropane?

 

[herbimycin]

guys was structure A 1-bromopropane?

think so. either that or 2-bromo, cant remember which way round it was

 

[herbimycin]

what did you guys get for 25 (phosphate ions)?

 

[Mannyg]

yeah,

guys was structure A 1-bromopropane?

A was 1-bromopropane as it hydrated to become a primary alcohol, while B was 2-bromopropane as it hydrated to become a secondary alcohol.

 

[Ishi081]

what was the shapes around the carbon atoms
was it trigonal planar and tetrahedral.

 

[help2024]

do you think I can get one mark for writing the dissociation equation for last q or no?

 

[Ishi081]

in the second last question how many marks would I get if I calculated the mass of the halogen and found it to be bromine (but later on wrote the wrong compound writing F - idk how I ended up doing that) and I got the structures of A and B (except the Flourine part) but not E with the correct justifications for A and B?

 

[herbimycin]

do you think I can get one mark for writing the dissociation equation for last q or no?

Often for a 4 mark calculation question you can get 1 mark for 'some relevant information', 2 for 'provides some steps of the calculation', 3 for 'provides most steps of calculation' and obviously 4 is getting it correct. So i would guess you would get a mark. probably 3 for those of us who forgot to subtract and got .53 or whatever it was. actual answer 0.39 im pretty sure

 

[lyingsalsa]

what was the shapes around the carbon atoms
was it trigonal planar and tetrahedral.

thats what i said as well but i had no idea lol