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Paper 5 Tips !! :)

T

TSZ

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Hey, I have some P5 problems.
my first question is from May june 12 ppr 51. In Q1 part (c), can any one explain, in detail (as these questions always get the best of me), how to produce a saturated solution of concentration 1.39 moldm-3. Then I can handle the rest :)
http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_s12_qp_51.pdf
http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_s12_ms_51.pdf

My next problem is in Paper 51 of Nov 12. What I don't get is that in Q1 part (e), how will we use the results to reach a conclusion. The mark scheme says to calculate moles of Pb and O, but in metallic reduction by H2, i think water is produced and not O2, then how will we calculate moles of Oxygen. Thank you in advance

http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_w12_qp_51.pdf
http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_w12_ms_51.pdf​
Hey, please help me out with these...please please please
 
xxfarhaxx

xxfarhaxx

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hw
TSZ said:
Hey, I have some P5 problems.​
my first question is from May june 12 ppr 51. In Q1 part (c), can any one explain, in detail (as these questions always get the best of me), how to produce a saturated solution of concentration 1.39 moldm-3. Then I can handle the rest :)​
​
My next problem is in Paper 51 of Nov 12. What I don't get is that in Q1 part (e), how will we use the results to reach a conclusion. The mark scheme says to calculate moles of Pb and O, but in metallic reduction by H2, i think water is produced and not O2, then how will we calculate moles of Oxygen. Thank you in advance​
​

Hey, please help me out with these...please please please
Click to expand...
hw did u get 1.39??
 
A

anishniroula

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Wanderer said:
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?
Click to expand...
just make a test tube and show how you heat the mass of ammonium nitrate. Now for condenser just make a box and write condenser in it. now connect that condenser to a calibrated gas syringe.
 
I

Iadmireblue

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Student12 said:
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s08_qp_5.pdf
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s08_ms_5.pdf
Question 2 part (d) How to draw the construction lines and the rest of part f.
Click to expand...
Okay
The answer to this depends on what values you have on your X and Y axis.
If it's mass of carbonate and mass of oxide,Find a point that lies on your line,and fine that value of mass of carbonate and oxide.
Then find the moles of oxide.You know that they react in a 2:1 ratio,so using this,you can find the moles of the carbonate.From this,you know the moles of carbonate mass of carbonate,and then you can calculate Mr.From here you can calculate values of X
Hope it helped
Good luck :)
 
Muhammad Bin Anis

Muhammad Bin Anis

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xhizors said:
https://www.xtremepapers.com/community/attachments/screen-shot-2013-05-07-at-9-16-31-pm-png.25142/
Soldier313 attempts, i think this is nice shot
Click to expand...

the marking scheme says:

Showing a condenser and collector for water (e.g. cooled (ice)
U-tube) connected to the ammonium nitrate apparatus. If a gas
collector is after this piece then the water collector must be gas
tight. If no gas collection is attempted after the water condenser
then it must be open to air. Allow a Liebig condenser provided it
fulfils the same conditions as stated above.
can somebody elaborate what is required in the highlighted and underlined phrase
 
Student12

Student12

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Iadmireblue said:
Okay
The answer to this depends on what values you have on your X and Y axis.
If it's mass of carbonate and mass of oxide,Find a point that lies on your line,and fine that value of mass of carbonate and oxide.
Then find the moles of oxide.You know that they react in a 2:1 ratio,so using this,you can find the moles of the carbonate.From this,you know the moles of carbonate mass of carbonate,and then you can calculate Mr.From here you can calculate values of X
Hope it helped
Good luck :)
Click to expand...
Sorry didn't get you..
Suppose i got x-axis: 3g and y-axis: 2g then how will i do it?
 
M

MaxStudentALevel

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TSZ said:
Hey, I have some P5 problems.
my first question is from May june 12 ppr 51. In Q1 part (c), can any one explain, in detail (as these questions always get the best of me), how to produce a saturated solution of concentration 1.39 moldm-3. Then I can handle the rest :)
http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_s12_qp_51.pdf
http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_s12_ms_51.pdf

My next problem is in Paper 51 of Nov 12. What I don't get is that in Q1 part (e), how will we use the results to reach a conclusion. The mark scheme says to calculate moles of Pb and O, but in metallic reduction by H2, i think water is produced and not O2, then how will we calculate moles of Oxygen. Thank you in advance

http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_w12_qp_51.pdf
http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_w12_ms_51.pdf​
Hey, please help me out with these...please please please
Click to expand...

I'm pretty sure I replied to your saturated solution question in detail!
 
Muhammad Bin Anis

Muhammad Bin Anis

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problem here

check out june 2012/52/q2 part(b)

A graph is to be plotted. the question says draw a line of best fit and the marking scheme says
checkfor a slightly downward sloping continuous curve.No straight/horisontal line.
Does it mean that we have to draw a smooth free-hand curve
 
xxfarhaxx

xxfarhaxx

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Muhammad Bin Anis said:
problem here

check out june 2012/52/q2 part(b)

A graph is to be plotted. the question says draw a line of best fit and the marking scheme says
checkfor a slightly downward sloping continuous curve.No straight/horisontal line.
Does it mean that we have to draw a smooth free-hand curve
Click to expand...
i thnk i rmmbr da qustn as draw da line of bst fit or curve is it? post the link
 
mominzahid

mominzahid

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xxfarhaxx

xxfarhaxx

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A

anitadesai

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in october 2010
how do u find the conc in oth the solution...
and the K value can it be either way
water over ethyl and ethyl over water
 
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