Chemistry P31!!

[TheDukee]

I'm having the exam this afternoon, but i'm 100% sure it's gonna be a 3 question exam (Titration, enthalphy, Salts). I've read some posts saying zinc nitrate & copper sulphate are going to included on the exam, plus 2 polysterene cups.

For what I've seen in the forums, the exams are pretty much the same, only the salts change. Anyone that is also doing this exam can throw in some predictions!

 

[musahala]

I lost my formula sheet , Can sum1 kindly post da formulae of moles and the Entalpy related formula

 

[zahraahmed]

hey just go this link and download the sheet i uploded:
viewtopic.php?f=26&t=6164

 

[TheDukee]

Titration:

Concentration = Moles / Volume
Moles = Mass / Molecular Mass

Changing mol/dm3 to g/dm3 = Concentration / Molecular Mass

Enthalphy:

(delta) Heat = Mass x Specific heat capacity (c) x (delta) Temperature.

(c) of water = 4.2 (can't remember the units)


For Salts you don't need formulas. With the formulas above and basic knowledge of chemistry, you'll be okay

 

[libra94]

u mean in the salt analysis we hav copper sulphate and zinc nitrate???

 

[Merdons Wolfman]

are u 100% sure

 

[filza94]

Topic To Stress On Biology Paper 33 AS
Gaseous exchange
Infectious diseases
Immunity
Transport: In plants- all the pathways in the cell (apoplast n symplast)
in humans- cardiac cycle, pressure graph, etc...
Nitrogen cycle

Itx surely cuming as my Biology Teacher predicted them every year she does n it cumss last year 4 my O level also she predict so i got A* n dat all camee now she precdicted for AS Paper 33 so evryone study all topics anyway so focusing on these shouldn't make u forget the others!!!!

 

[aislam17]

Thank you for the info but read the topic..its 31.

 

[filza94]

OOPZZZ SORRIEE......

 

[zahraahmed]

guys shes wrong
just check my post!!
viewtopic.php?f=26&t=6663