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September 19, 2025, 05:47:05 am
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Author Topic: VCE Chemistry 2010 Unit 3 Exam Suggested Solutions  (Read 72500 times)  Share 

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Studyinghard

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Re: VCE Chemistry 2010 Unit 3 Exam Suggested Solutions
« Reply #30 on: June 09, 2010, 06:09:22 pm »
How much will i lose if i wrote 3.82% then on the next line I wrote 3.8%
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10weid

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Re: VCE Chemistry 2010 Unit 3 Exam Suggested Solutions
« Reply #31 on: June 09, 2010, 06:09:46 pm »
good :)
also, did u hav to specify ethanoic anhyride or was ethanoic acid suffieicent?
coz their is no arguing that additon of ehtanoic acid to the pervious compound woul dresult in the one required :s
???
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taiga

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Re: VCE Chemistry 2010 Unit 3 Exam Suggested Solutions
« Reply #32 on: June 09, 2010, 06:10:06 pm »
You're supposed to use as many decimal places as you can during the working out though aren't you?. I wouldn't be surprised if they slashed half a mark for 3.81

I guess it's up to the assessors.


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Streaker

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Re: VCE Chemistry 2010 Unit 3 Exam Suggested Solutions
« Reply #33 on: June 09, 2010, 06:12:29 pm »
Tom Howe and chris culhane: dont worry.
« Last Edit: June 09, 2010, 09:14:56 pm by Streaker »
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10weid

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Re: VCE Chemistry 2010 Unit 3 Exam Suggested Solutions
« Reply #34 on: June 09, 2010, 06:13:10 pm »
Quote from: taigastyle on June 09, 2010, 06:10:06 pm
You're supposed to use as many decimal places as you can during the working out though aren't you?. I wouldn't be surprised if they slashed half a mark for 3.81

I guess it's up to the assessors.

no, because the previous value (3.07 grams) is to the correct number of significant figures..
so any subsequent calculations technically have to use 3,81 as a value, as it the most accurate than can be carried thoguh from previous calculations..

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10weid

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Re: VCE Chemistry 2010 Unit 3 Exam Suggested Solutions
« Reply #35 on: June 09, 2010, 06:13:34 pm »
no, because the previous value (3.07 grams) is to the correct number of significant figures..
so any subsequent calculations technically have to use 3,81 as a value, as it the most accurate than can be carried thoguh from previous calculations..
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taiga

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Re: VCE Chemistry 2010 Unit 3 Exam Suggested Solutions
« Reply #36 on: June 09, 2010, 06:15:45 pm »
I do worry.
« Last Edit: June 09, 2010, 09:17:49 pm by taigastyle »
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Studyinghard

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Re: VCE Chemistry 2010 Unit 3 Exam Suggested Solutions
« Reply #37 on: June 09, 2010, 06:17:09 pm »
The answer for 7bii is wrong.

you didnt include the Iodine in it.
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Richiie

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Re: VCE Chemistry 2010 Unit 3 Exam Suggested Solutions
« Reply #38 on: June 09, 2010, 06:18:53 pm »
Oh man.. i'm ashamed of my result now..
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Re: VCE Chemistry 2010 Unit 3 Exam Suggested Solutions
« Reply #39 on: June 09, 2010, 06:19:51 pm »
can anyone confirm 7 b ii?
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10weid

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Re: VCE Chemistry 2010 Unit 3 Exam Suggested Solutions
« Reply #40 on: June 09, 2010, 06:20:06 pm »
Quote from: Studyinghard on June 09, 2010, 06:17:09 pm
The answer for 7bii is wrong.

you didnt include the Iodine in it.

ur not meant to.
the iodine was used to work out how many double bonds..however u dont need to include it in the formula of te organic compound..

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Blakhitman

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Re: VCE Chemistry 2010 Unit 3 Exam Suggested Solutions
« Reply #41 on: June 09, 2010, 06:20:21 pm »
Quote from: Studyinghard on June 09, 2010, 06:17:09 pm
The answer for 7bii is wrong.

you didnt include the Iodine in it.

lolwut, it asked for cervaic acid, which Iodine reacts WITH.
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Studyinghard

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Re: VCE Chemistry 2010 Unit 3 Exam Suggested Solutions
« Reply #42 on: June 09, 2010, 06:21:24 pm »
wow. at first I didnt have the iodine and then i changed it to include the iodine. -.-
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bomb

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Re: VCE Chemistry 2010 Unit 3 Exam Suggested Solutions
« Reply #43 on: June 09, 2010, 06:21:46 pm »
Quote from: Studyinghard on June 09, 2010, 06:17:09 pm
The answer for 7bii is wrong.

you didnt include the Iodine in it.

Nah, the question asked for the formula of the acid, not of the product.

But, 7bi is wrong, because you didn't count the C=O, it asked for ALL double bonds.
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andy456

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Re: VCE Chemistry 2010 Unit 3 Exam Suggested Solutions
« Reply #44 on: June 09, 2010, 06:21:57 pm »
For the mole ratio i wrote 3:1.... is that wrong
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