Official OCR- AS Chemistry F321 January 2013 (revision, questions)

Hi there!
You see, I have a OCR Salters Chemistry AS level question about the coursework we must complete. I've been told it is related to 'Enthalpy Changes' and have been asked to look at the first two experiments in the Developing Fuels booklet (One where we had fuel and a calorimeter involved and the other zinc and a polystyrene cup ).
I'm stressing out about what I have to revise exactly because I've looked back at those experiments and, to be completely honest, I'm kind of stuck as far as preparing for it goes!

If you have any tips or ideas about my experiment, pleeaassseee help!

Also, what sort of things do you think I should revise for the 'written paper' part of the coursework.

-An extremely grateful stress-head.

I've got my chemistry assessed practical exam tomorrow and i'm doing OCR chemistry A. it's going to be a titration, but do you have any tips of getting the higher grades?

Hi Fruity, I am sorry but I don't know a single thing about what you are talking (I am doing OCR A), the best person to ask about his would be your TEACHER and your class mates (who I am sure would be doing the same thing). Go and ask them what they are doing and any help because I am sorry but I don't know a single thing about enthalpy change :P

The other thing I had to say was that i did a bit of research for you
and found these:

Again they may or may not help !


http://store.aqa.org.uk/qual/gce/pdf/AQA-2420-W-TRB-PSA04.PDF

http://www.webchem.net/notes/how_far/enthalpy/measurement_of_enthalpy.htm

And as for what you need to know :

1. definitions
2. precautions
3. reactions
4. calculations
5. and other stuff :P (which you have to spot because I don't know about your experiment

I hope this helps
xxx

EDIT: I got a really good powerpoint slide
but I don't know how to attach

Eeee! sorry if its a bit late

bUt a few things if you haven't done it yet

1. wash the burette with acid before starting (a really good practice)
2. so as with the pipette
3. perform it really carefully
4. do the calculations carefully too
5. Make sure to keep it swirling
6. wash the rod and beaker used for preparing standard solution into the flask so you don't loose any of the products


Hope this helps and here a are a few links worth watching before the task !

Step 1: http://www.youtube.com/watch?v=AU6ozDDlMTE

Step 2: http://www.youtube.com/watch?v=MuKh3s73IAM&feature=relmfu

Step 3: http://www.youtube.com/watch?v=DKRQ95QfWNY&feature=relmfu

Step 4: http://www.youtube.com/watch?v=iiedQ6dWZiA&feature=relmfu

Good Luck
xxx

Awww! Thank you! Haha - no, it really did help! Oh no - Powerpoint! Would the attachment sign thingymawotsit work!? Another thing is I know you do OCR, but just incase there is some overlap, how would you prepare for ISA type (experiment) questions? You know the whole reliability-validity stuff Cheers a million! xxxx

Aw this is the perfect thread, you're beautiful for creating it. I'm bad at the calculations for the titrations, do we have to find the concentration, water of crystallisation or relative mass of the solution? I get so confused, help!

Hey has anyone done any practicals so far then? Or is tomorrow your first one?

When is yours?

good

I have it next week the qualitative and quantitative and then the week following the last one

Btw i have my task practice for qualitative one tomorrow

How did it go??

Well there is 3 different ones so I'm not sure what ones you are doing however ones that I did were titrates 15/15 and 14/15 pm if you need any tips

1. Qualitative is titration

2. Quantitative is about 4 solution or whatever

3. EValuative i don't know yet :P