Chemistry AQA Unit 4 Discussion (CHM4)

OP

SilentGirl

I said unoxidised (so not a chemical word) alcohol but i hope the examiner gets the idea. :rolleyes:

If that is in fact the answer I think just 'alcohol' would suffice.

Reply 61

guys for the pH calculation
did everyone get
1.0x10-14/6.0x10-3

and then -log the answer of that?
I think i got 10 something, but everyelse said they got 11 something, unless I got 11 something but just can memba coz as far as i know my method was right

Reply 62

OP

Hatman09MedPlz

guys for the pH calculation
did everyone get
1.0x10-14/6.0x10-3

and then -log the answer of that?
I think i got 10 something, but everyelse said they got 11 something, unless I got 11 something but just can memba coz as far as i know my method was right

Your method looks decent but I'm afraid the answer was 11 point something...

Reply 63

alan910_2

If that is in fact the answer I think just 'alcohol' would suffice.

yh i hope its alcohol coz thats what i put :smile:

that uni 1st year qustionw as so unfair, but i shouldve got it right, common sense shouldve prevailed and i shoudve put down oxidation
oh well, was only one mark, mina!

Reply 64

Waterstorm

16

Hatman09MedPlz

guys for the pH calculation
did everyone get
1.0x10-14/6.0x10-3

and then -log the answer of that?
I think i got 10 something, but everyelse said they got 11 something, unless I got 11 something but just can memba coz as far as i know my method was right

Yeah, I've heard that whoever did the Kw way got 10 something, and whoever did the pOH way got 11 :s-smilie:

Reply 65

Waterstorm

Yeah, I've heard that whoever did the Kw way got 10 something, and whoever did the pOH way got 11 :s-smilie:

Temp was 298 K

It was a strong base, so pOH is fine. (i think)

Reply 66

RageC

7

Hatman09MedPlz

yh i hope its alcohol coz thats what i put :smile:

that uni 1st year qustionw as so unfair, but i shouldve got it right, common sense shouldve prevailed and i shoudve put down oxidation
oh well, was only one mark, mina!

shame i put oxidation

Reply 67

OP

Waterstorm

Yeah, I've heard that whoever did the Kw way got 10 something, and whoever did the pOH way got 11 :s-smilie:

Hmm that's interesting.

I could understand that if it was 11.01 and 10.99 or something...

But I think it was near 11.82 or thereabouts...

Reply 68

alan910_2

Your method looks decent but I'm afraid the answer was 11 point something...

okay, i mustve got 11 point somethign because thats exactly what i did, and i just typed it into my calc and i got that. unless i was an idiot and typed 6x10-4 into my calc insted, ahh thats sum awful mistake if i did that, but it would only mean ive lost one mark as my methods right :-)

Reply 69

RageC

shame i put oxidation

haha shut up u wasteman
u got an email from bristol?
lol ******!

Reply 70

I just checked. Its was 69/90 for an A in Jan 08. Not bad at all. :biggrin:

Reply 71

OP

OK, better get to physics revision for tomorrow.

IF ANYONE CAN GET THE PAPER, PLEASE POST IT!

Reply 72

RageC

7

WAT WAZ TEH ANZWA TO THE ROLE OF hno3!!?

Reply 73

RageC

WAT WAZ TEH ANZWA TO THE ROLE OF hno3!!?

acts as a base, read above!

Reply 74

alan910_2

OK, better get to physics revision for tomorrow.

IF ANYONE CAN GET THE PAPER, PLEASE POST IT!

yh i need to get to some bio
although gonna watch yesterdays eastenders first!
and a shout to anyone that could possibly make an unofficial markscheme :smile:

Reply 75

alan910_2

If that is in fact the answer I think just 'alcohol' would suffice.

Cool. You appiled for natural science to cambridge. Did you have an interview before the decision?Also, did you do TSA (thinking skills assessment or someting)?

Reply 76

purplecakes

I hate the way everything in the paper is worth 1 or 2 marks. its a saviour for silly mistakes but annoying when they ask something you know really well!

Reply 77

Waterstorm

16

SilentGirl

Cool. You appiled for natural science to cambridge. Did you have an interview before the decision?Also, did you do TSA (thinking skills assessment or someting)?

My friend applied to natural sciences at cambridge, dunno if he had to do a TSA.. but he had an interview, they asked him some wierd stuff about benzene :p:

Reply 78