Paper 5 Tips !! :)

[knowitall10]

Hey guys just a couple more questions I'd be so grateful if you answered
knowitall10 got my spelling of grateful right!

-ON 2007 Q1 moles 0.05-0.25 specified why do they do that?
-ON 2009/52 Q1 (a) the MS says "predicts all strong acids have constant DeltaHNeut. <--- HOW?
And the same question says "no grading here"
-ON 2009/52 Q1 (d) I get that 6*10^-2 moles is excess but how do we fill the table?

Any help would be greatly appreciated guys!

Lol
Sure!
o/n o7-- depending on the metal hydroxide, you have to choose the right mass. basically, the markscheme says that for any metal hydroxide, the number of moles used in the questions must be within 0.05-0.25 moles. because some are extremely reactive. so a descent pick would be this.
o/n 09 52-- all 3 are strong acids, read the box again keeping this in mind
for the next one, sorry.. i ignored that question when i was rushing through my papers.. so i would appreciate it if anyone explains it to both of us..sorry...

 

[xhizors]

Also, xhizors what's how to we get the formula Q=cmdeltaT/moles and what is it for?

i guess this was for neutralisation question,
so the point was we know 1 mols of Naoh gives 1 mol of h20(equation)
neutralization is for 1 mol of h20 produced
so energy evolved divided by the n mols of Naoh(1:1 ka ratio)

 

[xhizors]

xhizors could you help me out a bit in part (e) of ON 2007 Q1? All I'm confused about is why are the moles specified to 0.05-.25?

still problem?

 

[Soldier313]

Mine was 67.5, same as someone else in the main chemistry doubt thread that posted their graph! You should try and go find it! It's after page 220!

why am i getting solubility values over a 100 for this qn :O is that the case for every1?
xhizors knowitall10 and others?

 

[xhizors]

Lol
Sure!
o/n o7-- depending on the metal hydroxide, you have to choose the right mass. basically, the markscheme says that for any metal hydroxide, the number of moles used in the questions must be within 0.05-0.25 moles. because some are extremely reactive. so a descent pick would be this.
o/n 09 52-- all 3 are strong acids, read the box again keeping this in mind
for the next one, sorry.. i ignored that question when i was rushing through my papers.. so i would appreciate it if anyone explains it to both of us..sorry...

nov 52 going to attemp insha Allah

 

[xhizors]

why am i getting solubility values over a 100 for this qn :O is that the case for every1?
xhizors knowitall10 and others?

ya me too getting weired values but we all having the same issue

 

[VelaneDeBeaute]

why am i getting solubility values over a 100 for this qn :O is that the case for every1?
xhizors knowitall10 and others?

Hey, which paper is this?

 

[Soldier313]

Hey, which paper is this?

http://papers.xtremepapers.com/CIE/...d AS Level/Chemistry (9701)/9701_s09_qp_5.pdf

qn 2 a

ya me too getting weired values but we all having the same issue

owww okay then perhaps that's the way it has to be :/

 

[xhizors]

whats the rocket science in it any one pls !
http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_w12_qp_53.pdf
Q3d
AmoooMMM

 

[iKhaled]

paper 5 chemistry should be removed from A2 and they should put a MCQ for A2 instead..i think its much better paper 5 is just sooo lame and it sucks

 

[nurina]

http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_w12_qp_52.pdf can you help me with 1(d)

 

[knowitall10]

A

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s09_qp_5.pdf

qn 2 a


owww okay then perhaps that's the way it has to be :/

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

 

[autumnsakura]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w12_qp_52.pdf can you help me with 1(d)

I posted my diagram here. Not sure if it's correct but hope it helps?

 

[backtodev]

What should the diagram in Q1d) of Nov 12 V51 be
http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_w12_qp_51.pdf

 

[autumnsakura]

What should the diagram in Q1d) of Nov 12 V51 be
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w12_qp_51.pdf

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w12_qp_52.pdf can you help me with 1(d)

I found another diagram by another member on this thread. Scroll down to find it.
https://www.xtremepapers.com/community/threads/chemistry-p52.5294/page-2#post-525408

 

[stella jazz]

do read some older key points notes
solubility = (mass of solid x 100) / mass of water

thank u can u also let me know about the molality formula

 

[Daisy_94]

http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_w09_qp_51.pdf
Q1(d)
Pls explain the c1v1=c2v2 the range of concentrationshow do I do this.........................
Or attach the solved paper .....pls guys help !

 

[xhizors]

thank u can u also let me know about the molality formula

if finding molality in 1000g
molality = molex1000/mass of water

 

[xhizors]

http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_w09_qp_51.pdf
Q1(d)
Pls explain the c1v1=c2v2 the range of concentrationshow do I do this.........................
Or attach the solved paper .....pls guys help !

go on 1st page i have posted their how to make diff concentrations
thats exactly what you want

 

[Silent Hunter]

paper 5 chemistry should be removed from A2 and they should put a MCQ for A2 instead..i think its much better paper 5 is just sooo lame and it sucks

yeah! with p5 having everytime different calculations and stuff :\ :\ .... May we all get best grades Ameen