AQA Chemistry Practical - Discussion Thread

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The UMS / Raw marks vary each year depending on how everyone does.

But this section is out of 45 UMS and the rest is on Module 3 which is 75 UMS

Reply 21

merc123

Have you got 2001-2004 past papers for the A2 practical, Milne?

Reply 22

TheBoot

useful_idiot

yes, i left my answer as 1 mole CuSO4:1.5 moles H2O...but it's like an equation where you double the values to get a whole number, thats how i tried to explain it, like an empirical formula calculation.

As i said, rounding down by nearly half a mole is, in my opinion, just stupid...but if that's the answer, gutted. 29/30 max for me.

and i, and most in my session at school for 132.2 for the Mr.

yeah, i see what you're saying

Reply 23

Speedbird2008

TheBoot

no 2CuSO4.3H2O is wrong, it asked for how many moles of h20 present with one mole of copper sulphate, it was correct to round down which is what i did.

Went well, I got most of it right from what I can remember, except the planning section - I used random figures of CuSO4 and Zn powder; 100cm^3 and 10g respectively.

:p:

Reply 24

Prof Milne

merc123

Have you got 2001-2004 past papers for the A2 practical, Milne?

Sorry I only have the 2002 and 2003 papers. Hope this helps, sorry I couldn't be of anymore help.

All the best.

KJDM

June 2002 - A2 Practical QP.pdf81.0KB

June 2002 - A2 Practical MS.pdf587.4KB

June 2003 - A2 Practical QP.pdf237.3KB

June 2003 - A2 Practical MS.pdf252.6KB

Reply 25

Botticello

I made a hash of the exercise 2 :frown:

Reply 26

merc123

Thanks a lot Milne, your the best.

Reply 27

merc123

Hopefully they'll repeat things from the old papers lol, thanks again.

Reply 28

thetoothfairy

used 25cm^3 of CuSO4, and whatever mass that means for zinc (0.38 I think?). BUTTTTTTT for got minus sign! cuz its exo! dayum

Oh and i had to ask for more HCL (cuz I ran out cuz I dodnt read 'dilute') only to realize 30 seconds later that I didnt need it! *******S!!!! lol

But ye, I ***** up the practical, so 25/30 for me I think. WHat does that scale to on UMS? ANyone know?

Reply 29

alicey08

i completely messed up exercise 2. I got in a panic. oops... never mind.

Reply 30

Prof Milne

How did you mess it up? Exercise two do you mean the planning?

Reply 31

Prof Milne

In short, yes basically you would - as long as you described that on the fourth minute the temperature difference (deltaT) was between the extended extrapolation and line of best fit before the zinc was added.

If you did this and described as you just did I don't see any reason why the examiners should dock you marks, as I have done this also on a mock exam and got full marks.

It's always best to do examples though, so bare that in mind.

KJDM