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February 18, 2026, 08:10:21 am
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Author Topic: Exam Thoughts  (Read 17655 times)  Share 

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the.watchman

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Re: Exam Thoughts
« Reply #75 on: June 15, 2011, 04:04:36 pm »
Quote from: Jdog on June 15, 2011, 04:01:57 pm
the copper sulfate was D since all three occur

the CuSO4 is oxidized to Cu2+, the emission of light is caused by transition between energy levels and it does absorb red light

Cu2+ is not oxidised, it changes into its elemental state, meaning if anything, it is reduced
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Tashi

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Re: Exam Thoughts
« Reply #76 on: June 15, 2011, 04:06:13 pm »
Quote from: the.watchman on June 15, 2011, 04:04:36 pm
Quote from: Jdog on June 15, 2011, 04:01:57 pm
the copper sulfate was D since all three occur

the CuSO4 is oxidized to Cu2+, the emission of light is caused by transition between energy levels and it does absorb red light

Cu2+ is not oxidised, it changes into its elemental state, meaning if anything, it is reduced

Phewwwwww! I said I and III? Man, I just have no idea.
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the.watchman

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Re: Exam Thoughts
« Reply #77 on: June 15, 2011, 04:06:45 pm »
Quote from: Tashi on June 15, 2011, 04:06:13 pm
Quote from: the.watchman on June 15, 2011, 04:04:36 pm
Quote from: Jdog on June 15, 2011, 04:01:57 pm
the copper sulfate was D since all three occur

the CuSO4 is oxidized to Cu2+, the emission of light is caused by transition between energy levels and it does absorb red light

Cu2+ is not oxidised, it changes into its elemental state, meaning if anything, it is reduced

Phewwwwww! I said I and III? Man, I just have no idea.

yes i wrote B for that one, statements I and III
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JayCanteloupe

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Re: Exam Thoughts
« Reply #78 on: June 15, 2011, 04:07:14 pm »
was Q4 36.81 or 36.8 ?
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jackson1234

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Re: Exam Thoughts
« Reply #79 on: June 15, 2011, 04:08:59 pm »
I think it was 4 sig figs.
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Tashi

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Re: Exam Thoughts
« Reply #80 on: June 15, 2011, 04:09:58 pm »
Quote from: nashyj on June 15, 2011, 04:07:14 pm
was Q4 36.81 or 36.8 ?

Yeah it was probably to 4 because those are the only relevant numbers used in the calculations. I wrote to 3 :( And I barely showed any working.
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the.watchman

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Re: Exam Thoughts
« Reply #81 on: June 15, 2011, 04:10:48 pm »
Quote from: Tashi on June 15, 2011, 04:09:58 pm
Quote from: nashyj on June 15, 2011, 04:07:14 pm
was Q4 36.81 or 36.8 ?

Yeah it was probably to 4 because those are the only relevant numbers used in the calculations. I wrote to 3 :( And I barely showed any working.

hmm, 4 sigfigs i did, all the relevant info was 4 sigfigs
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Jdog

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Re: Exam Thoughts
« Reply #82 on: June 15, 2011, 04:14:14 pm »
FUCK!

FUCK!

FUCK!

i fucked this up so badly.

also apparently the question 8 is D. Tushan said it was D so I believe he is correct
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cltf

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Re: Exam Thoughts
« Reply #83 on: June 15, 2011, 04:15:12 pm »
Quote from: mattshen on June 15, 2011, 04:02:58 pm
Quote from: 4231 on June 15, 2011, 04:01:07 pm
it was 2:3
a lot of people got 1:2 but that is wrong, if u go to the other post witht he exam in it and re-read the question, in reaction 2, 1 ethanoic acid is produced but in three it is doubled, so the CO2 produced in that one is 1. overall there was 6CO2:4CH4 produced
hmmmm yea that's what i got...

Its 1:2 because the first reaction yields 2 lots of Ethanol, the next only shows one but the that reaction will happen twice you you'll have 2 lots of ethanoic acid present, which leads on to the next reaction.
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Tashi

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Re: Exam Thoughts
« Reply #84 on: June 15, 2011, 04:15:35 pm »
What was the answer to MC 8 with ibuprofen? I don't get why it wouldn't be a simple condensation reaction forming a peptide linkage?
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cltf

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Re: Exam Thoughts
« Reply #85 on: June 15, 2011, 04:16:37 pm »
Quote from: Jdog on June 15, 2011, 04:14:14 pm
FUCK!

FUCK!

FUCK!

i fucked this up so badly.

also apparently the question 8 is D. Tushan said it was D so I believe he is correct
The Obvious answer was C, I put D cause Ionic is more soluble, but it could be increased polarity as well.
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the.watchman

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Re: Exam Thoughts
« Reply #86 on: June 15, 2011, 04:17:16 pm »
Quote from: cltf on June 15, 2011, 04:16:37 pm
Quote from: Jdog on June 15, 2011, 04:14:14 pm
FUCK!

FUCK!

FUCK!

i fucked this up so badly.

also apparently the question 8 is D. Tushan said it was D so I believe he is correct
The Obvious answer was C, I put D cause Ionic is more soluble, but it could be increased polarity as well.

damn, i cant read the questions...
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cltf

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Re: Exam Thoughts
« Reply #87 on: June 15, 2011, 04:18:33 pm »
Quote from: Tashi on June 15, 2011, 04:15:35 pm
What was the answer to MC 8 with ibuprofen? I don't get why it wouldn't be a simple condensation reaction forming a peptide linkage?
The question was asking which form was MORE soluble, all of them are soluble, but the question is where ionic supersedes polarity.
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Jdog

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Re: Exam Thoughts
« Reply #88 on: June 15, 2011, 04:19:23 pm »
The anser is apparently the ionic one
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fatimaseraj

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Re: Exam Thoughts
« Reply #89 on: June 15, 2011, 04:20:30 pm »
Paper easy got 36.8 for 4 a) and same for 4 b)
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