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Chemistry 2006 exam


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Poll: How was it? (44 member(s) have cast votes)

how easy was it?

  1. Very hard (1 votes [2.27%])

    Percentage of vote: 2.27%

  2. Hard (10 votes [22.73%])

    Percentage of vote: 22.73%

  3. OK (24 votes [54.55%])

    Percentage of vote: 54.55%

  4. Easy (8 votes [18.18%])

    Percentage of vote: 18.18%

  5. Really easy (1 votes [2.27%])

    Percentage of vote: 2.27%

What grade do you think you got?

  1. A (18 votes [40.91%])

    Percentage of vote: 40.91%

  2. B (22 votes [50.00%])

    Percentage of vote: 50.00%

  3. C (3 votes [6.82%])

    Percentage of vote: 6.82%

  4. D (1 votes [2.27%])

    Percentage of vote: 2.27%

  5. Fail (0 votes [0.00%])

    Percentage of vote: 0.00%

Vote Guests cannot vote

#21 Mark

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Posted 30 May 2006 - 05:29 PM

QUOTE(Tinkerbell @ May 30 2006, 06:26 PM) View Post

QUOTE(rscott @ May 30 2006, 06:19 PM) View Post

I got stuck on the question that asked for the mass of chlorine for like ten minutes, cause I kept getting an answer like 1400000000000kg. I think I got it eventually though lol.

Did anyone get 10% for the percentage yield question?


so wot was the final answer you got for the mass of chlorine cos i got like a really long 5 figure number i think... sad.gif although i did also get 9.98% smile.gif



They wouldnt give us a copy of the paper at the end so not sure but I think it was over 1000Kg something or other cant remember exactly 1400 odds sticks in my head but not sure of the exact number.

#22 ice_illusion

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Posted 30 May 2006 - 05:36 PM

I wrote my mc down this time and I got:
1A
2C
3D
4B
5A
6B
7D
8B
9D
10C
11A
12B
13A
14A
15C
16B
17B
18A
19B
20D
21D
22B
23C
24D
25A
26D
27B
28A
29C
30C
31B
32C
33D
34D
35C
36B
37B
38C
39C
40B

I thought the multiple choice was fairly average and the second part was easier than usual. Although I must admit that I may not have done a huge range of past papers. >.< But it did go better than any of my other exams, I think.

QUOTE(Mark @ May 30 2006, 06:29 PM) View Post

QUOTE(Tinkerbell @ May 30 2006, 06:26 PM) View Post

QUOTE(rscott @ May 30 2006, 06:19 PM) View Post

I got stuck on the question that asked for the mass of chlorine for like ten minutes, cause I kept getting an answer like 1400000000000kg. I think I got it eventually though lol.

Did anyone get 10% for the percentage yield question?


so wot was the final answer you got for the mass of chlorine cos i got like a really long 5 figure number i think... sad.gif although i did also get 9.98% smile.gif



They wouldnt give us a copy of the paper at the end so not sure but I think it was over 1000Kg something or other cant remember exactly 1400 odds sticks in my head but not sure of the exact number.

I got something in the thousands too, which I thought was quite high but if lots of people are getting it it might be ok.

And I put 10% for the percentage yield question.


Can anyone remember what they put with the multiple choice question that had toothpaste as one of the answers. I think the question was which isn't a commen use of esters: flavourings, perfume, solvent or toothpaste. (I don't think thats quite the right question)

#23 rscott

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Posted 30 May 2006 - 05:37 PM

I put toothpaste. It was in one of the past papers - can't remember which one.

#24 Adam

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Posted 30 May 2006 - 05:38 PM

I put toothpaste.

#25 Mark

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Posted 30 May 2006 - 05:39 PM

what did everyone put as the apparatus
I put a conical flask with solid mixture in it, rubber stopper with tube, and gas syringe (do they even exist lol), and an electric heater.

Thought it was fine til someone reminded me that if you draw the stopper over the tube they will say gas wont escape. well that is just stupid. I'm not a blummin artist!!

like this

http://www.gcsechemistry.com/igasyringe.htm

#26 ice_illusion

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Posted 30 May 2006 - 05:46 PM

QUOTE(Mark @ May 30 2006, 06:39 PM) View Post

what did everyone put as the apparatus
I put a conical flask with solid mixture in it, rubber stopper with tube, and gas syringe (do they even exist lol), and an electric heater.

Thought it was fine til someone reminded me that if you draw the stopper over the tube they will say gas wont escape. well that is just stupid. I'm not a blummin artist!!

I drew a test tube with a stopper on that had a tube leading out of it into a basin full of water, which had a upturned measuring cylinder in. My test tube with solid inside was in a hot water bath.
I'm hoping the gas that came out of it isn't soluble in water. Anyone know?

#27 rscott

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Posted 30 May 2006 - 05:47 PM

I had the same test tube, with the solid inside being heated, but instead of the syringe I used the displacement of water thing, with a tube running down into water and underneath a measuring cylinder.

#28 ad absurdum

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Posted 30 May 2006 - 05:47 PM

Well, I thought that the exam paper was alright. I wouldn't say it was pish easy but I didn't think any questions were particularly challenging. I thought that the last question was going to be difficult (it reminded me of the NMR one in one of the past papers, I found this difficult) but it turned out to be quite easy.

I can't remember my multiple choice answers as I don't have a question paper, but I got 39/40, assuming my teacher was correct biggrin.gif
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#29 rscott

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Posted 30 May 2006 - 05:49 PM

QUOTE(ice_illusion @ May 30 2006, 06:46 PM) View Post

QUOTE(Mark @ May 30 2006, 06:39 PM) View Post

what did everyone put as the apparatus
I put a conical flask with solid mixture in it, rubber stopper with tube, and gas syringe (do they even exist lol), and an electric heater.

Thought it was fine til someone reminded me that if you draw the stopper over the tube they will say gas wont escape. well that is just stupid. I'm not a blummin artist!!

I drew a test tube with a stopper on that had a tube leading out of it into a basin full of water, which had a upturned measuring cylinder in. My test tube with solid inside was in a hot water bath.
I'm hoping the gas that came out of it isn't soluble in water. Anyone know?


It was methane, which I'm sure isn't soluble in water.

#30 ice_illusion

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Posted 30 May 2006 - 05:50 PM

QUOTE(rscott @ May 30 2006, 06:49 PM) View Post

QUOTE(ice_illusion @ May 30 2006, 06:46 PM) View Post

QUOTE(Mark @ May 30 2006, 06:39 PM) View Post

what did everyone put as the apparatus
I put a conical flask with solid mixture in it, rubber stopper with tube, and gas syringe (do they even exist lol), and an electric heater.

Thought it was fine til someone reminded me that if you draw the stopper over the tube they will say gas wont escape. well that is just stupid. I'm not a blummin artist!!

I drew a test tube with a stopper on that had a tube leading out of it into a basin full of water, which had a upturned measuring cylinder in. My test tube with solid inside was in a hot water bath.
I'm hoping the gas that came out of it isn't soluble in water. Anyone know?


It was methane, which I'm sure isn't soluble in water.

Thanks, Good to know. biggrin.gif

#31 Mark

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Posted 30 May 2006 - 05:51 PM

QUOTE(rscott @ May 30 2006, 06:49 PM) View Post



It was methane, which I'm sure isn't soluble in water.



correct. I was thinking about the heating of it and thought methane - flammable can't use a naked flame. is that where the water bath comes in I suppose.

#32 rscott

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Posted 30 May 2006 - 05:51 PM

Anyone get addition polymerisation for that synthetic plastic thing???

#33 jon2005

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Posted 30 May 2006 - 05:52 PM

why was a bag used in that question with the drinks test? yup got additon.

#34 Nathan

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Posted 30 May 2006 - 05:53 PM

QUOTE(rscott @ May 30 2006, 06:51 PM) View Post

Anyone get addition polymerisation for that synthetic plastic thing???



i think i put condensation polymerisation ph34r.gif

cannae remember tho...seems so long ago

#35 rscott

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Posted 30 May 2006 - 05:53 PM

The bag question was strange. I said it was "to limit the volume of breath blown" or something.

#36 Mark

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Posted 30 May 2006 - 05:53 PM

QUOTE(jon2005 @ May 30 2006, 06:52 PM) View Post

why was a bag used in that question with the drinks test? yup got additon.



So you know enough puff has been given for a proper colour change - or words to that effect laugh.gif

#37 ice_illusion

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Posted 30 May 2006 - 05:55 PM

I put so the volume of breath that went past the thingy crystals was kept constant and that makes it more reliable.

#38 Nathan

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Posted 30 May 2006 - 05:56 PM

QUOTE(ice_illusion @ May 30 2006, 06:55 PM) View Post

I put so the volume of breath that went past the thingy crystals was kept constant and that makes it more reliable.


woot biggrin.gif that's what i said

#39 Mark

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Posted 30 May 2006 - 05:58 PM

QUOTE(ice_illusion @ May 30 2006, 06:55 PM) View Post

I put so the volume of breath that went past the thingy crystals was kept constant and that makes it more reliable.

I'm sure any of they kinda answers will be fine as it's a bit vague and there are a few plausible answers. Funny this was one of the random inane bits of information our teacher talked about when doing oxidsation of alcohols.

#40 David_07

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Posted 30 May 2006 - 05:59 PM

Hey, this is my first post. I was on Gabbly earlier though, talking about this exam.

I suppose it wasn't too bad, I got about 30 or 31 for MC and I thought the rest went quite well.


For that bag question, I put so that the same amount of air is used every time and makes it more accurate. I also noticed the equation had water in it so I added that it collects the water unsure.gif





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