Paper 5 Tips !! :)

[xhizors]

are doubts left ??

 

[Zari]

JazakAllah for this xhizors May Allah help us all

 

[brainiac]

guys can anyone please help me with the reasons for the anomalous points , i m not able to evaluate the correct reasons for the anomalies in the graph ??

 

[Haaris Habib]

y
yup it will be in the tube after decomposition i guess u take it into beaker

k... thx mate... but we dnt hav to write it.... right???

 

[Soldier313]

A
Alright, what's with the question, may i ask?

the solubility values are somehow coming to above a 100 :/ and as far as i know solubility is never above 100

 

[backtodev]

Also for June 2012 V1 Q1 c) the planning part
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s12_qp_51.pdf

The ms says
"Check that the solution is made up to the appropriate volume and not that a mass is added to a fixed volume of water."
So the question said "Remember that you are using 100 cm3 of aqueous copper(II) sulfate"
So when making the concentration of the copper sulfate soluton, do I dissolve the CuSo4.5H20 in 100 cm3 water, less than 100 cm3 water, or fill the volumetric flask to 250 cm3.
[p.s. this thread is really amazing, iSA you guys will do brilliantly!]

oops nvm i deleted the last post
but yes, this was the doubt
xhizors
or anyone

 

[Xtremite]

are doubts left ??

Yessss...
how to calculate the mass deposited from a solubility curve,

like the question q 2 part (d) in may june 2011 Paper 53

 

[Alevel Romeo]

xhizors

Please can you tell me how we are supposed to draw the diagram for JUNE12/52 q1 c
It's a decomposition reaction of Ammonium Nitrate in which both water vapour has to be condensed and collected and Nitrogen(I)oxide has to be collected too...I cant understand how both water vapour and gas collection has to be done?

i just set up a round buttom flask and a outlet but could not seperately collect the two gases!!! i am also worried about the question

 

[Haaris Habib]

i just set up a round buttom flask and a outlet but could not seperately collect the two gases!!! i am also worried about the question

go to page 2... ull find the diagram there....

 

[MaxStudentALevel]

HEY ANYONE could you PLEASE let me know if we eed those squiggly lines to show the orgins which aren't true?!!?

 

[danyaljamil]

can some please help with how to determine avagadros constant through experimentation! please decribe it please!​

 

[Zari]

Asalamualikum can anyone help me as well i am not able to identify how do we know the specific reason for each anomalous point just like in this paper http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_w11_qp_51.pdf in q2 part c ?
and one thing more in this same paper what amounts of water and potassium nitrate to use in Q1 part c bullet 2 ?

 

[knowitall10]

the solubility values are somehow coming to above a 100 :/ and as far as i know solubility is never above 100

are you guys doing mass of solid/ mass of solution x 100?

 

[iKhaled]

question one 1 c october november 2008..how can i calculate the mass of water..is 60cm^3 means 60g or what?

http://papers.xtremepapers.com/CIE/...d AS Level/Chemistry (9701)/9701_w08_qp_5.pdf

 

[Kinjal]

solubility cant be above 100g because here we calculating solubility in 100g of water u might have did something wrong
what are your column headings??

For calculating the solubilities i took mass of the solid,which for the first case,is 77.9 .Then I divided it by the mass of the water which is 43.5,for the first one. So the solubility is that times a 100,so my first solubility is 179. Is that wrong? What are you supposed to do then??

 

[knowitall10]

did you understand what the marking scheme says?

Asalamualikum can anyone help me as well i am not able to identify how do we know the specific reason for each anomalous point just like in this paper http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w11_qp_51.pdf in q2 part c ?
and one thing more in this same paper what amounts of water and potassium nitrate to use in Q1 part c bullet 2 ?

 

[knowitall10]

question one 1 c october november 2008..how can i calculate the mass of water..is 60cm^3 means 60g or what?

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w08_qp_5.pdf

Can u repeat your question? i don't get what you're saying,..

 

[Zari]

did you understand what the marking scheme says?

not exactly

 

[iKhaled]

Can u repeat your question? i don't get what you're saying,..

i need to find the solubility so it is mass of solid dissolved/mass of water. they gave me 60cm^3 of distilled water should i pretend that 1g = 1cm^3 or there is a way to find the mass of water?

 

[xxfarhaxx]

mines graph is same too but the point is solubility is coming more than 100g shed light plz

here is the table, nd it shud cum more than 100.. anywys chck it with ths!