AQA CHEM1 Fri 21 May Watch

?!master?!mini?!
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#181
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#181
(Original post by Miss.R)
Yeah i got that..

But i meant i mucked up on the explanation. put the Be something donates the lone pair to F instead of the other way around.
it was the other way around :o:
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jak67m
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#182
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#182
(Original post by Unknown-User)
Argh I wrote about the spark then crossed it out for some reason :| Do you think I will get a mark for saying that the heat from the engine will provide enough energy for the reaction to occur?
yeh i wrote about how the engine heats up and it gives enough energry for the nitrogen and oxygen in the air to react??? would that b correct?
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Haruhi
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#183
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#183
(Original post by Unknown-User)
Argh I wrote about the spark then crossed it out for some reason :| Do you think I will get a mark for saying that the heat from the engine will provide enough energy for the reaction to occur?
I think you would still get the mark as long as you said spark/heat/temp enough for reaction 8D

It was 2 marks, did you write the equation?
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?!master?!mini?!
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#184
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#184
(Original post by becca-x)
I did x10^6 to make it cm^3 and then divided that by 1000, i dont know if that was right
(Original post by becca-x)
that's right

m^3 to dm^3 = X 10^3

which is what you did, in a long winded way :p:
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HaimishaParekh
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#185
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#185
(Original post by k1n60fthew0rld)
I have this in 2 hours, slightly nervy. Just wondering, will somebody be posting a rough mark scheme on here afterwards? Just so we can gage how we got on?

Really need an A, been averaging 83% on all the past papers, done from June 06 - Jan 2010, so nervous. My report for end of year, averages a C, basically been a lazy sod all year now I'm actually trying.
Story of my life.. how did u find it?
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jak67m
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#186
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#186
Graphite question
- Each carbon covalently bonded to 3 other carbons
- 2 dimensional hexagonal shape
- Van De waalls forces act between these hexagonal shapes

why does it have high melting point
It requires alot of energy to break down the covalent bonds.

hrmmm was theereee anything else to write??
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_Andrew_
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#187
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#187
I thought that paper was more challenging in comparison to the past papers. I nearly put Argon instead of Neon for which has the greatest first ionization energy :oops:
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Tam_91
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#188
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#188
(Original post by Miss.R)
Yeah i got that..

But i meant i mucked up on the explanation. put the Be something donates the lone pair to F instead of the other way around.
Yeah it's meant to be the other way round as F- ion has a full outer shell whereas BF3 has 6 electrons for it's outer shell and so the F- will donate the electron pair.
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Master.K
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#189
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#189
One emotion = :cry:

The paper raped me.
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Tam_91
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#190
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#190
(Original post by jak67m)
Graphite question
- Each carbon covalently bonded to 3 other carbons
- 2 dimensional hexagonal shape
- Van De waalls forces act between these hexagonal shapes

why does it have high melting point
It requires alot of energy to break down the covalent bonds.

hrmmm was theereee anything else to write??
I think that's all. I included talking about the delocalised electron too (since carbon only bonds to 3 others) just incase and I like to waffle, but I don't think it matters since it asked about stucture and forces, not about why it conducts electricity.
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?!master?!mini?!
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#191
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#191
(Original post by _Andrew_)
I thought that paper was more challenging in comparison to the past papers. I nearly put Argon instead of Neon for which has the greatest first ionization energy :oops:
I thought Fluorine was the greatest first ionization energy???

I thought Noble gases don't have an ionization energy???
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becca-x
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#192
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#192
What does everyone think the grade boundaries will be like?
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CHEM1STRY
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#193
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#193
(Original post by ?!master?!mini?!)
I thought Fluorine was the greatest first ionization energy???

I thought Noble gases don't have an ionization energy???
yes they do, its neon
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_Andrew_
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#194
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#194
(Original post by ?!master?!mini?!)
I thought Fluorine was the greatest first ionization energy???

I thought Noble gases don't have an ionization energy???

They do, but there just ridiculously high
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Lol123
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#195
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#195
(Original post by becca-x)
I did x10^6 to make it cm^3 and then divided that by 1000, i dont know if that was right

Ah I had no idea! I just wrote "they are both very reactive" and something about the S having lone pairs, because I really didnt know and only had a few minutes left. My friend said it was because the SO2 was acidic and the CaO was alkaline.
Yeah I said something about Lone pairs on oxygen donated to sulphur, but that seems obvious, neutralisation , uch thats so annoying, theyve all of a sudden made chem1 quite hard in comparison to what it is! Bit sly, yeah I think your right haah im such an idiot!
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?!master?!mini?!
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#196
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#196
(Original post by CHEM1STRY)
yes they do, its neon
Wahhhhht, they never say this in the book, or showed it on the graph in the paper
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_Andrew_
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#197
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#197
(Original post by becca-x)
What does everyone think the grade boundaries will be like?

I'm guessing around 80% for an A
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_Andrew_
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#198
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#198
(Original post by ?!master?!mini?!)
Wahhhhht, they never say this in the book, or showed it on the graph in the paper
It was horrible trick question. the *******s
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Master.K
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#199
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#199
(Original post by _Andrew_)
I'm guessing around 80% for an A
No way!
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Stirlo
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#200
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#200
(Original post by ?!master?!mini?!)
I thought Fluorine was the greatest first ionization energy???

I thought Noble gases don't have an ionization energy???
They do, I noticed how they left chlorine off the graph for period 3 in order to try and make people fall into the trap of putting fluorine for the highest ionisation energy of period 2.

Overall found the paper alright, with section B being quite easy, only found a couple of the first sub questions challenging, so hope I've done better this time around
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