Engineer_192931
Member
- Joined
- Oct 18, 2022
- Messages
- 46
- Gender
- Male
- HSC
- 2023
Wait dw I realise now
doesnt 1,2-dichloroprop-1-ene fit cause you could assume Q might have a double bond and since doesnt specify excess cl2 it could only have 1 double bond being saturated also 1,2-dichloroprop-1-ene has 32 percent carbon by mass and has molecular ion peak at 114 it also has a fragment at 15 and 62?The addition of chlorine to an alkene produces a dichloroalkane.
The fact that the mass spectrum appears to show only one is misleading. The product should be 1,2-dichloropropane.
The mass spectrum of the compound can be seen at this link: https://webbook.nist.gov/cgi/cbook.cgi?ID=C78875&Mask=200#Mass-Spec
You can see that it matches the spectrum provided in the exam, but with the lowest intensity peaks missing.
Taking the 35Cl : 37Cl ratio as 3 : 1 yields the parent (molecular) ion, [C3H6Cl2]+ . at m/z = 112, 114, and 116 in a 9 : 6 : 1 ratio.
Rather than wait for some genius person who got everything right, how bout we just compile everyone’s answers.Solutions ?
Surely multiple choice at least
I think i got something likeRather than wait for some genius person who got everything right, how bout we just compile everyone’s answers.
Here’s what I had for everything
the full paper isn’t uploaded yet so I can’t check this but I think I got all A’s for 18, 19, and 20 (I rushed multiple choice so this could be wrong)
Now if anything looks wrong just tell me and I’ll edit this
1. DRather than wait for some genius person who got everything right, how bout we just compile everyone’s answers.
Here’s what I had for everything
1. A
2. C
3. B
4. D
5. D
6. C
7. A
8. B
9. D
10. A
11. C
12. B
13. A
14. D
15. B
16. B
17. C
the full paper isn’t uploaded yet so I can’t check this but I think I got all A’s for 18, 19, and 20 (I rushed multiple choice so this could be wrong)
Now if anything looks wrong just tell me and I’ll edit this
Lol I had a typo for question 1. Please don’t pour organic stuff down the sinkI think i got something like
1D 2C 3B 4D 5D 6C 7A 8C 9C 10A 11C 12B 13A 14(idk but i think B?) 15B 16B 17(idk but i think A) 18(A i think) 19(also A i think) 20D
not sure that these are exactly what i put for everything but i think it's decently close
i think 14 was D, in the exam i chose C lol,i read sodium carbonate and thought it was nahco3, doing this lead me to 29.I think i got something like
1D 2C 3B 4D 5D 6C 7A 8C 9C 10A 11C 12B 13A 14(idk but i think B?) 15B 16B 17(idk but i think A) 18(A i think) 19(also A i think) 20D
not sure that these are exactly what i put for everything but i think it's decently close
Yeah I did C cause the equivilance point was acidicLol I had a typo for question 1. Please don’t pour organic stuff down the sink
Hmm you guys are probably right about 9 since it gets neutralised really fast.
The uploaded paper doesn’t have the questions so I can’t check working out. I think ppl are saying 18-A, 19-A and 20-D thoWhat were 18-20 agian?
Dissociates into NH4+ which donates proton to water and there is B-L acid.How did you guys prove NH4Cl was a B-L acid? I’m trying to write up dot point solutions
You were given a mass spec and asked which produced the peak at 43 or somethingbruh anyone remember what q19 dont remember what i put for that shit
i genuinely cant remember what i put for 14 so i might have had the same answer as u, possibly not tho idk1. D
2. C
3. B
4. D
5. D
6. C
7. A
8. C
9. C
10. A
11. C
12. B
13. A
14. D
15. B
16. B?
17. A
I forgot what 18-20 were.
I knew it was between A or B but i didn't know which had the + on it and i didn't know if that was the charge or not so i just had the one where the thing that didnt contain the O had the + which was A i thinkYou were given a mass spec and asked which produced the peak at 43 or something