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CHEM1 15 May 2012 AQA OFFICIAL POST EXAM

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Hey!!! I thogght it was an OKAY exam. :frown:

. What did people get for the question why is the marcomolecular structure very good conductor or somthing? And suggest why titanium in different shapes have the same somthing??

Macromolecular structures a very good conductor because of the delocalised electrons isn't it? Thats what I put anyway, because each carbon is only bonded to 3 others leaving a spare pair of electrons to create that barrier inbetween slates like in graphite, and the electricity is conducted here.
For the titanium bit I didn't have a clue, just put the bonds aren't broken, only moved/changed.

Reply 21

143143143

How were we supposed to know the chemical formula for Sodium borate?

I guessed and put NaBO2 (which is sodium metaborate which is still a salt of borate?) when it was actually NaBH.

Reply 22

ebie1995

thought it was a bit of a weird paper not particularly like any others I've done, and no definitions at all

Reply 23

DisturbingKand0R

Original post by king101

Hey!!! I thogght it was an OKAY exam. :frown:

. What did people get for the question why is the marcomolecular structure very good conductor or somthing? And suggest why titanium in different shapes have the same somthing??

for titanium Q, i wrote that the structure remains the same, it is not damaged and bonds aren't broken, therefore the strength is similar no matter what shape titanium is beated to. Not sure if it is right though

Reply 24

AishaTara

Original post by DisturbingKand0R

yeah i hate it when you know answer and write it wrong, happens to me all the time, hopefully not this time as i checked it for ages

atleast I'll only lose 1 mark for that hopefully. argh I wish I read stuff properly. Nevermind everyone will make a silly mistake.
what do you think the grade boundary will be?

Reply 25

AishaTara

Original post by DisturbingKand0R

i put same chemical properties :s-smilie:

Reply 26

lochbeau

Original post by AishaTara

atleast I'll only lose 1 mark for that hopefully. argh I wish I read stuff properly. Nevermind everyone will make a silly mistake.
what do you think the grade boundary will be?

Probably just 56/70 for an A again, won't go lower than 54.

Reply 27

DisturbingKand0R

Original post by 143143143

How were we supposed to know the chemical formula for Sodium borate?

I guessed and put NaBO2 (which is sodium metaborate which is still a salt of borate?) when it was actually NaBH.

NaBO2 is right, the 'ate' means it has oxygen in it, and i just wiki.ed it

Edit: this was a while ago, I think i was wrong

(edited 11 years ago)

Reply 28

143143143

Original post by AishaTara

atleast I'll only lose 1 mark for that hopefully. argh I wish I read stuff properly. Nevermind everyone will make a silly mistake.
what do you think the grade boundary will be?

I think they'll be low.
-No definitions
-The 5:1 ratio
-5000 cm3 volume
-functional group

(edited 11 years ago)

Reply 29

143143143

Original post by DisturbingKand0R

NaBO2 is right, the 'ate' means it has oxygen in it, and i just wiki.ed it

If this is completely legit, I want to hug you.

Reply 30

DisturbingKand0R

Original post by lochbeau

Probably just 56/70 for an A again, won't go lower than 54.

i have a feeling it may be higher possibly 57/8 out of 70 for an A because if you look at previous papers, this was slightly easier
Jan 12 i think was harder

Reply 31

DisturbingKand0R

Original post by 143143143

I think they'll be low.
-No definitions
-The 5:1 ratio
-500 cm3 volume
-functional group

oh crap i forgot to answer the functional group Q, i was going to come back to it

Reply 32

joker12345

Original post by lochbeau

Got a good chance of an A if thats the case, think the PV = nRT question will make or break my grade. Either way, only got a C last time due to panic so even a B will suffice. If 86.4 is correct and my method is wrong, will I get all 3 marks, 2 or 1?

Original post by DisturbingKand0R

i think if the answer is right then you would get 1 mark, because all the other marks are method marks

From looking at lost of past markschemes, in the notes it usually says award all marks if you have the exact, correct answer. :smile:

Reply 33

DisturbingKand0R

Original post by 143143143

I think they'll be low.
-No definitions
-The 5:1 ratio
-500 cm3 volume
-functional group

what was the answer to the functional group one though?

Reply 34

DisturbingKand0R

Original post by joker12345

From looking at lost of past markschemes, in the notes it usually says award all marks if you have the exact, correct answer. :smile:

I hope you're right lol

Reply 35

travispickle

You had to make it a cycloalkane, I didnt think, and just moved the double bond >_>

Reply 36

143143143

Original post by DisturbingKand0R

oh crap i forgot to answer the functional group Q, i was going to come back to it

I hated that question, took me over 10 minutes. :s-smilie:

If it wasn't for the unit 3 past papers (old spec) I wouldn't have put anything. (I used "epoxy" 3 carbons bonded to each other)

At least it was only 1 mark!

Reply 37

Crescentise

Original post by 143143143

I think they'll be low.
-No definitions
-The 5:1 ratio
-500 cm3 volume
-functional group

I agree with this. There were loads of large nested calculation questions where you had to think of a route to the end, whereas in pretty much every single paper in the past, it was just one question made up of 1-mark a), b), c) and so on.

Original post by DisturbingKand0R

what was the answer to the functional group one though?