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September 03, 2025, 11:28:34 am
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Author Topic: 2009 Chemistry Unit 3 Exam Questions and Suggested Solutions  (Read 40883 times)  Share 

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monokekie

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Re: 2009 Chemistry Unit 3 Exam Questions and Suggested Solutions
« Reply #15 on: June 10, 2009, 02:53:35 pm »
yeah. why are vcaa so mean, i thought last year's was already quite tough, yet this year's like a monster~!!
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mystikal

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Re: 2009 Chemistry Unit 3 Exam Questions and Suggested Solutions
« Reply #16 on: June 10, 2009, 02:54:31 pm »
sigh ..... what you guys reckon the A+ cut off is ? i reckon its gonna be 63/73
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monokekie

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Re: 2009 Chemistry Unit 3 Exam Questions and Suggested Solutions
« Reply #17 on: June 10, 2009, 02:57:18 pm »
i reckon (hope) its gonna be 59/73
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avram_grant

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Re: 2009 Chemistry Unit 3 Exam Questions and Suggested Solutions
« Reply #18 on: June 10, 2009, 02:57:34 pm »
pretty hard, very long - not expecting the state to do too well on this one guys
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jess3254

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Re: 2009 Chemistry Unit 3 Exam Questions and Suggested Solutions
« Reply #19 on: June 10, 2009, 02:59:27 pm »
Shit I really screwed it up =/
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rhjc.1991

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Re: 2009 Chemistry Unit 3 Exam Questions and Suggested Solutions
« Reply #20 on: June 10, 2009, 03:02:34 pm »
it was out of 73.

Hey, was answer to q19 MC really D? because i got that and ppl said it was wrong.
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dekoyl

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Re: 2009 Chemistry Unit 3 Exam Questions and Suggested Solutions
« Reply #21 on: June 10, 2009, 03:04:00 pm »
Quote from: MHSazn on June 10, 2009, 03:02:34 pm
it was out of 73.

Hey, was answer to q19 MC really D? because i got that and ppl said it was wrong.
I got B but I don't doubt Mao too much aha.
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avram_grant

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Re: 2009 Chemistry Unit 3 Exam Questions and Suggested Solutions
« Reply #22 on: June 10, 2009, 03:04:39 pm »
i dont know man, i just guessed that one; some of the questions were random
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/0

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Re: 2009 Chemistry Unit 3 Exam Questions and Suggested Solutions
« Reply #23 on: June 10, 2009, 03:05:54 pm »
In Q7a Short answer isn't Step 1 also reduction?



C goes from +4 to 0?
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rhjc.1991

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Re: 2009 Chemistry Unit 3 Exam Questions and Suggested Solutions
« Reply #24 on: June 10, 2009, 03:09:47 pm »
Quote from: elle.21 on June 10, 2009, 03:07:33 pm
Quote from: /0 on June 10, 2009, 03:05:54 pm
In Q7a Short answer isn't Step 1 also reduction?



C goes from +4 to 0?

Yeah I put that too..




but ughhh :(

I had to go on enter calc and do some adjusting ahaha
when they said X, do they mean the point above the surface of the liquid?
me too!

When they say X do they mean the point above the liquid surface?
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jules

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Re: 2009 Chemistry Unit 3 Exam Questions and Suggested Solutions
« Reply #25 on: June 10, 2009, 03:10:50 pm »
when it says moles of hydrogen for question 4b) moles of hydrogen reacting, dont we multiply by 2 since there are two hydrogens in hydrogen gas?
or did i just overthink that question lol
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rhjc.1991

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Re: 2009 Chemistry Unit 3 Exam Questions and Suggested Solutions
« Reply #26 on: June 10, 2009, 03:11:16 pm »
The carbon in CO2 is in the +4 oxidation state, while the carbon in glucose (C6H12O6) has an oxidation state of zero.!!


NO!!!! That means I got it wrong--I originally had 4
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Mao

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Re: 2009 Chemistry Unit 3 Exam Questions and Suggested Solutions
« Reply #27 on: June 10, 2009, 03:13:40 pm »
Oh yes, Q7 a can also be step 1 :)
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ilovevce

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Re: 2009 Chemistry Unit 3 Exam Questions and Suggested Solutions
« Reply #28 on: June 10, 2009, 03:18:17 pm »
Quote from: dekoyl on June 10, 2009, 03:04:00 pm
Quote from: MHSazn on June 10, 2009, 03:02:34 pm
it was out of 73.

Hey, was answer to q19 MC really D? because i got that and ppl said it was wrong.
I got B but I don't doubt Mao too much aha.

Technically, B would be correct. Some of the water would vaporise and then condense as it rose up the apparatus. However, the amount of vaporised water would be very small. Practically, the difference in percentage concentration of ethanol would be so small as to be insignificant.
This should have been an explanation question.
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emkate

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Re: 2009 Chemistry Unit 3 Exam Questions and Suggested Solutions
« Reply #29 on: June 10, 2009, 03:21:03 pm »
does anyone know what % they had to get last year to get an A+ ? i worked out my answers think i might have got around 86%.. what will that give me?
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