Paper 5 Tips !! :)

[knowitall10]

B

um but how do we decide?

y the shape of the plotted points. Did u plot them? See how it goes.. it's s smooth curve

 

[knowitall10]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w12_qp_53.pdf
Question 3 last 2 parts :|

i'm stuck too :/

 

[knowitall10]

i'm stuck too :/

for (e), calculate the % error.

 

[danyaljamil]

can anyone help with determining avogadros constant through experimentation please help

 

[iFuz]

i'm stuck too :/

Part d :|

 

[xhizors]

one more thing in calculating delta C in labarotory, do we have to calculate Q for 1 mol of CO^2 produced like in stardard enthalpy of combustions.......if so then formula wud be mc4T/moles of co^2 produced(by the calulated moles of ethanol by stoichiometry) ???
my teacher didnt give much coaching for preparing p5 nd she goes on telling looong stories

yup

 

[xhizors]

n

do we have

to convert the mass of solid from g--->to kg??? sorry if im bothering alot,(extremely confused private candidate)

nopes

 

[xhizors]

n

arent we supposed to conver C* to kelvin?????

nooo we are measuring in *C scales

 

[nidanas]

umm hi! cud u plz tell me abt d graph?! I mean how do I get to know if d graph shud b a curve or a straight line?!

and also d anomalies, how do we speak about dem?! IM CONFUSED! :/

 

[Soldier313]

Is it the same thing? i forgot the year we were discussing

hahaa lol....it's mj/09! qn 2!

 

[donorsolutions]

Molality = (no.of Moles x 1000) / mass of water

wow man. u posted all these tips really amazing. Keep up the good work!

 

[Soldier313]

I'm sorry xhizors the internet was playin arnd gettin me pissed :/ Finally, here, my solubility table.. and yeah, i like ur idea of discussing papers
Jazak Allahu Khair brother

sis, there' a mistake in this nah? i mean we all got values of solubility above a 100, and i think you've taken mass of solution, rather than water? or am i mistaken someplace ?

 

[abdulmoizmehmood]

can anyone help me with this question?
http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_w10_qp_53.pdf
q.2 a

Thanks!

 

[kitty_toxic]

ummm ASAP what about p5 Oct/Nov 2011 part f) how are they gettin Pb3O4????? i mean how do we calculate it cuz i keep gettin a gradient of 1

 

[xhizors]

sis, there' a mistake in this nah? i mean we all got values of solubility above a 100, and i think you've taken mass of solution, rather than water? or am i mistaken someplace ?

thts wht i am saying

 

[donorsolutions]

Can you guys also suggest a sensible diagram for NOV10/53 q1
What sort of internal separation device will be used here to separate H2O2 and the catalyst??

use a divided flask. this type of flask has two sections. in one section we have catalyst and in another h202 so set the whole apparatus and for reaction to occur shake the flask so that the reagents come into contact!

 

[Ash1994]

How do we knw what the gradient represents?
Like when it says use the value of the gradient to find anothee quantity?

 

[xhizors]

ok guys going 2 sleep take care everyone,
May Allah swt Reward us all, Bless us all, grant us all the ultimate rewards, immense blessings, ultimate success Ameen!
May Allah help me and everyone else to proactively, awesomly, successfully attempt tommorows paper Ameen
May Allah help me and everyone else to get the 100% marks tommorow Ameen Ameeen Ameeen Ya RabbalAlameen!!
Please pray for my distinction and unlimited success....

tc,
Never settle for the less u can be!
Expect from yourself like no one has ever did,
your bro
Salam!

 

[knowitall10]

thts wht i am saying

xhizors nai meri baisti to karli.. you go ahead as well Soldier313

 

[knowitall10]

A

ok guys going 2 sleep take care everyone,
May Allah swt Reward us all, Bless us all, grant us all the ultimate rewards, immense blessings, ultimate success Ameen!
May Allah help me and everyone else to proactively, awesomly, successfully attempt tommorows paper Ameen
May Allah help me and everyone else to get the 100% marks tommorow Ameen Ameeen Ameeen Ya RabbalAlameen!!
Please pray for my distinction and unlimited success....

tc,
Never settle for the less u can be!
Expect from yourself like no one has ever did,
your bro
Salam!

Aaammeeeeenn!!!! and May you get that World Distinction