Chem Exam

[Isaac S]

It was out of 3 marks if I remember correctly, and I think the answer is 37 minutes (I may be wrong).

Yep, 37 minutes

[everythangcoZ]

Yep, 37 minutes

Yesss, 37 minutes!

[Tunde46]

What did you guys get for the analysis of the organic compound with C4H8O but non cyclic and contained double bonds... was it an ether molecule with carbon to carbon double you had to draw I couldn’t find any peak for aldehyde or ketones 🥴😬

[RingoAC]

What did you guys get for the analysis of the organic compound with C4H8O but non cyclic and contained double bonds... was it an ether molecule with carbon to carbon double you had to draw I couldn’t find any peak for aldehyde or ketones 🥴😬

ohhhhh I thought it was C=O double bond and drew a ketone and an aldehyde

[ActivationEnergy]

ohhhhh I thought it was C=O double bond and drew a ketone and an aldehyde

I drew a ketone and an aldehyde as well lol.

[Isaac S]

Yeah i drew two ethers...

[ActivationEnergy]

For the question, i think it was a question where the solution was not aqueous and it asked to write the overall equation. Did you guys include states in it? I didn't know what states to put since it said it wasn't aqueous...

[hairs9]

If that was the redox question without given states, I just ignored it. 90% chance it won't be the states question since it was only worth a mark

[ActivationEnergy]

If that was the redox question without given states, I just ignored it. 90% chance it won't be the states question since it was only worth a mark

Ok thanks I ignored the states as well.

[AAGlue]

dietary fibres are cellulose tho, which can't be digested - I'm not sure tho I'm pretty bad at chem and our teachers are sketchy lol

No I got 0.73 bananas, because there’s less carbs, and cuz the energy value is smaller when you take away the fibre you need more bananas to get the 300 Kj
Wow what did I just write omg lol

[everythangcoZ]

I drew a ketone and an aldehyde as well lol.

I did the same, there was a peak at around 1600-1700, so I just assumed it would be so..

[Coolgalbornin03Lo]

What did everyone say for the “what information from the HNMR a and how it can help you decide what the structure is”

You has to make 3 points but it was my last question so idk what even happened (I did Q9 &10 first)

[AAGlue]

What did everyone say for the “what information from the HNMR a and how it can help you decide what the structure is”

You has to make 3 points but it was my last question so idk what even happened (I did Q9 &10 first)

1) number of environments - 3
2) relative areas = number of H - 3:2:2
3) 1 of the chemical shifts corresponding to an environment - I wrote 3.85 ppm was a R-CH3-CO smth like that

Then I just linked it to something about the structure
Imo it should have been like a 6 mark Q and there should have been more lines to write in

[Coolgalbornin03Lo]

1) number of environments - 3
2) relative areas = number of H - 3:2:2
3) 1 of the chemical shifts corresponding to an environment - I wrote 3.85 ppm was a R-CH3-CO smth like that

Then I just linked it to something about the structure
Imo it should have been like a 6 mark Q and there should have been more lines to write in

Yeah since there was no space I wasn’t specific to the question about C4H.....oops I could barely fit explaining what that is AND how it helps to decide. 0/3 marks for me VCAA have mercy 

[Isaac S]

What did you guys say when it asked to talk about comparing methane obtained from landfill compared  to natural gas?