Paper 5 Tips !! :)

[Zari]

did you understand what the marking scheme says?

what does the ms says i am not able to figure it out sis ?

 

[MaxStudentALevel]

Hey guys, very small doubt please try to help out!
For MJ 2010 51 The (i) part of Q1
How do you get the expression? What it it?
I get the (-) sign but the expression ?

 

[studyexams]

heyy please reply to my post.too urgent :/

 

[xhizors]

i hav qute a gud reason fr tat! i have to sit 2 pprs contnsly!

oh Lol,, if u can, do pushups between breaks that would help
insha Allah

 

[MaxStudentALevel]

Or if you don't want those, you could just write FO (false origin).

OHhh thankyou! Where would I write that??

 

[stella jazz]

sorry 4 being a pain in the head but i still didnt get it ....how do we use c1v1=c2v2 ...they havnt given anything apart from the con of NaoH ..the question asks us 2 prepare solutionsof an appropriate range of con

this person posted it and i have a doubt in the same ques

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s12_qp_51.pdf (june 2012 paper 51 q 1c)......problem in all three parts...plz help:........

 

[Kinjal]

Hey guys, very small doubt please try to help out!
For MJ 2010 51 The (i) part of Q1
How do you get the expression? What it it?
I get the (-) sign but the expression ?

The expression is (vol of acid+vol of alkali)x4.3x(change in temp) / moles of NaOH
This is because enthalpy change of neutralization is per 1 mole of H2O. And according to the equation,moles of H2O=moles of NaOH..i.e its 1:1

 

[xhizors]

sorry 4 being a pain in the head but i still didnt get it ....how do we use c1v1=c2v2 ...they havnt given anything apart from the con of NaoH ..the question asks us 2 prepare solutionsof an appropriate range of con

man read it awesomly
it says prepare enough solutions of copper(II) sulfate of an appropriate range of
concentrations to give sufficient data to plot a graph as in (a)(ii),

so u need cuso4 conc
solution is of naoh and cuso4
so now c1v1=c2v2 makes sense

 

[MaxStudentALevel]

The expression is (vol of acid+vol of alkali)x4.3x(change in temp) / moles of NaOH
This is because enthalpy change of neutralization is per 1 mole of H2O. And according to the equation,moles of H2O=moles of NaOH..i.e its 1:1

Ohhhhh got it! Thanks!!!!!!!

 

[Gémeaux]

OHhh thankyou! Where would I write that??

Near where the origin would have been, the bottom left of the grid.

 

[Ash1994]

are doubts left ??

They give you alot of lines to write for just 4 marks or 5 marks max and ask you to include a few points only why is that
i never fill all the lines =S

 

[Kinjal]

Ohhhhh got it! Thanks!!!!!!!

Ur welcome!

 

[xhizors]

Bismillah,
AsSalamalaikum wr wb
I think another good strategy to do a better practice is to start revising paper together!
Plan:
we would pick a qp
give approx 15 mins to it
mean while discuss it
and then move to next question
Results:
it would be healthy for everyone
we could generalize the trend
and all the problems and doubts would be swept out as whole

so what you say?

 

[xxfarhaxx]

oh Lol,, if u can, do pushups between breaks that would help
insha Allah

u mean lyk infornt of the entire hall..hmm. any advce on mind exrcse..

 

[xhizors]

They give you alot of lines to write for just 4 marks or 5 marks max and ask you to include a few points only why is that
i never fill all the lines =S

year 12 no lines at all expected same for y13

 

[MaxStudentALevel]

Soldier313 thank you SOSOMUCH that was such a great explanation!
I'll pray you get what you want out of these exams In Shaa Allah!!

- one last thing, how do I calculate the weak acids then???

 

[xhizors]

u mean lyk infornt of the entire hall..hmm. any advce on mind exrcse..

well u need to find a way
Never Ever try to settle for the less you can be
and Ask Allah for the strength, help and ability to rockup the paper

 

[alim]

plx plx plx explain jun 12/51 q1c part1 n 2

 

[xhizors]

Bismillah,
AsSalamalaikum wr wb
I think another good strategy to do a better practice is to start revising paper together!
Plan:
we would pick a qp
give approx 15 mins to it
mean while discuss it
and then move to next question
Results:
it would be healthy for everyone
we could generalize the trend
and all the problems and doubts would be swept out as whole

so what you say?

??

 

[knowitall10]

can u upload ur table?

sure.. here: