Edexcel chemistry 1 Watch

science king
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#661
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#661
for peraffin ..... is it from fossil fuels ( crude oil ) ???
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franco1000
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#662
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#662
(Original post by PureGenius)
Yes ^^ as its only one mark for each, just need accelerate for electric and deflect for magnetic as the key words
ah thank u soo much
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franco1000
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#663
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#663
(Original post by science king)
for peraffin ..... is it from fossil fuels ( crude oil ) ???
yh it was crude oil, but i just cudnt remember these words in the exams so i ended up putting coal! lool
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shadow12345
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#664
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#664
where is the paper? some 1 upload it pls
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jskapur
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#665
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#665
(Original post by Soppe)
where is the paper? some 1 upload it pls

yes please, if someone has it.
Please upload it.
Thanks
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franco1000
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#666
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#666
(Original post by Soppe)
where is the paper? some 1 upload it pls
i dont think anyones got it, its strange usually theres someone who manages to upload the paper every time but i guess we r just unluky. we might hav 2 wait a while to get our hands on it.
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faizahc
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#667
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#667
(Original post by Epic_Fail)
omg that question was just pure evil, i made up the biggest load of crap ever, i said the test tube could've fallen and split the water 8-) and that they could minimise the risk by having the test tube held firmly by a clamp also the beaker used to put the water in could have been bigger so that the water isn't so near the edge!

i mean come on, looking back at that answer makes me sound like a complete idiot LOL
The main risk was the delivery tube would suck water back when the heating stop so they had to remove it before they stopped heating it
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SK-mar
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#668
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#668
(Original post by franco1000)
do you rekon i will get the marks for saying :

electric field : used to accelerate the sample
magnetic field: used to deflet the sample
for the electric field one i put it directs the ions into a narrow beam through the mass spec. will that get the mark? its what it says in my revision guide.
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SK-mar
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#669
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#669
(Original post by faizahc)
The main risk was the delivery tube would suck water back when the heating stop so they had to remove it before they stopped heating it
yeh but that wasnt a risk whilst they were heating it so it cant have been one of the valid risks surely? Im almost 100% sure the biggest risk was that the bung didnt even fit the tube LOL.... therefore major gas leakage. Btw i think saying that the test tube in the water wasnt fixed by a clamp is a valid point cos the other tube had an arrow pointing to it saying it was fixed. Lets be serious a tube held by nothing isnt just gonna stay there fixed therefore id say it was a risk .
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woozeybear
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#670
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(Original post by SK-mar)
yeh but that wasnt a risk whilst they were heating it so it cant have been one of the valid risks surely? Im almost 100% sure the biggest risk was that the bung didnt even fit the tube LOL.... therefore major gas leakage. Btw i think saying that the test tube in the water wasnt fixed by a clamp is a valid point cos the other tube had an arrow pointing to it saying it was fixed. Lets be serious a tube held by nothing isnt just gonna stay there fixed therefore id say it was a risk .
If the delivery tube is under water the water gets sucked up and the test tube explodes..trust me - I've done it didn't write it down though..dang..

Oh wait..I didn't read something right..now I'm not sure I'm gonna revise!
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infernalcradle
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#671
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#671
can someone put the damn paper up!

ugh...I flopped this paper
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DaveyJam
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#672
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#672
(Original post by Craydot)
The question abt electron density maps was D, the one with the most distorted electron cloud right?
No, D had delta +ve and delta -ve which means that it was covalent

C was showing perfectly ionic (which is was not)

A/B showed Iodine being distorted or Lithium being distorted - Iodine was distorted
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infernalcradle
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#673
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#673
(Original post by DaveyJam)
No, D had delta +ve and delta -ve which means that it was covalent

C was showing perfectly ionic (which is was not)

A/B showed Iodine being distorted or Lithium being distorted - Iodine was distorted
exactly...it was A....you had the small lithium ion and the large iodine ion, neither touching, but the iodine was distorted towards the lithium
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aneesh
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#674
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#674
Solutions Anyone ????
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franco1000
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#675
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#675
(Original post by SK-mar)
for the electric field one i put it directs the ions into a narrow beam through the mass spec. will that get the mark? its what it says in my revision guide.
i rekon if my answer wud get the mark, urs definatley will
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Itachi8
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#676
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#676
some one upload the paper
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crazymonkey24
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#677
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#677
i liked the paper better than the jan 2010 one but i think i lost easy marks. I can't tell how i did. ????????? :unsure:
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Ryan03201
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#678
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#678
For the question about the risks for the apparatus I said heating the aluminium oxide was very exothermic so therefore I would heat for a few seconds then remove the flame then heat etc to avoid the test tube breaking/melting. Will I get at least 1 mark or have I thrown away 4 marks?
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Da_hopeful_1
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#679
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#679
(Original post by Soppe)
Did any 1 get how many isotopes for br78 n br82 thing.... I pit 2 but I wasn't sure.. And come to think of it I may have let slip a few maks here n there
I think there were 3 peaks

79-79
79-81
and then 158-158




But obviously I'm probably gonna be wrong :/

I found the multiple choice questions really tricky as well.

Especially the one with the ionisation energies graph where we had to identify the group for the certain letter. That really stumped me

I agree that it's not enough to just memorise and remember in chemistry. You have to actually understand most of it as well

Arghhhh another fail for me then :'(
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Da_hopeful_1
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#680
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#680
(Original post by Stratos)
I think most of it was fairly average however the Paraffin questions were nonsensical there was nothing about paraffin in the edexcel chemistry book >< And i also fked up the ppm completely forgot how it worked and just skipped it on revision.
I Think i wrote crude oil for that one, but my friend said it came from petrol :/
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