need help in chem p5

[mariam]

i dont even knw a single word of it.! can somebody plz tel the technique of solving chem p5??

 

[princesszahra]

yea sure i can help
can u tell any specific topic??

 

[mariam]

can u plz tel me the techniques of solving p5? how to answer question 1 and 2

 

[princesszahra]

well in these questions also they ask abt improvements and the errors
and for this paper u need to have a good idea of the core
go through the past papers
tell any specific doubt

 

[Jazib]

well in these questions also they ask abt improvements and the errors
and for this paper u need to have a good idea of the core
go through the past papers
tell any specific doubt

in some questions, he asks to mention values e.g 1 mole of alcohol etc, how do v knw appropriate quantities?

 

[princesszahra]

all the questions when they say abt setting up
and they ask abt the quantities
u have to mention them!

 

[Jazib]

ofcourse v have to mention em. what i meant was that what shud b the appropriate quantity. how wud v knw about it?

 

[princesszahra]

take a syringe it can be max of 50 cm^3 ( i've seen this size in lab)
u then do a rough calculation
and just round it and write!

 

[Jazib]

hmm... what about masses? e.g an ionic solid. what do u think shud b the max mass of it if vr using it..?

 

[princesszahra]

hmm depends on what the reaction would be
and if ur not sure its better to use 5g

 

[Jazib]

dont u think, v shud give quantities in mole? like o.1 mole etc

 

[princesszahra]

u can use in moles too
then ull need to show how u got em

 

[Jazib]

hmm.... this means, mass is better. thnx!

 

[princesszahra]

ur always welcome!

 

[nannes]

u just gotta be systematic in your planning...making sure u enter proper values and precautionary measures...

 

[princesszahra]

ya ull have to do it!
just be in an order!

 

[leah]

i have the same problem, i mean i can plan exp but my main problem is the specific values they ask for masses etc. can u plz also tell me how to prepare diff concentrations of solutions either by serial dilution or other method, reaction times, and appratuses for volumes cuz some are really accurate and some are not, ill be really thankful if anybody helps me out cuz odawise ill be losing major chunk of points.

 

[zahraahmed]

I need help asap for question 2(e) in June 07 Chem p5, I have already drawn the graph however I just dont know how to find 'x' ...

http://www.xtremepapers.me/CIE/Internat ... 7_qp_5.pdf