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- Reaction score
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anything else on physics ?
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CHEMISTRY PAPER 34 On 31st MAY
- Thread starter DeadbeatCIE
- Start date
Can anyone please provide experimental values for some or even one of these papers? it would help me solve them.Ok. Guyz, i dont know whether this is illegal or something but I can say the papers u must go through. I can confirm that there will be a question from the following. Informally, I can say that the first question might be a enthalpy graph question(50% chance) or titration with H2O2 (50% chance). Reaction time may come as 2nd question but it can be also titration(if it doesnt come for (1)) so yeah, it might. I guess enthalpy of disosciation of H2O2 is possible. I cant confirm anything cos I dont know whether it is illegal but go through the following papers. There is a question based from the following papers.
February march 2016 paper 33
October November 2012 paper 34
October November 2014 paper 34
May June 2014 paper 33
May June 2014 paper 34
May June 2015 paper 35
October November 2007 paper 32 (out of syllabus question-but if u can do it, u are on the safe side)
Its just hard to do so, without any values to begin with.
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- Reaction score
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I too find it hard. Just put some values accoding to ur approximations and theoritical knowledge.Thanks
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Reaction 3 is shown below.
Cu(s) + H 2 SO 4 (aq) → CuSO 4 (aq) + H 2 (g)
Reaction 3
(f) Use your values for the enthalpy changes for Reactions 1 and 2 to calculate the enthalpy
change for Reaction 3.
Mg(s) + H 2 SO 4 (aq) → MgSO 4 (aq) + H 2 (g) Reaction 1
Mg(s) + CuSO 4 (aq) → MgSO 4 (aq) + Cu(s) Reaction 2
Show clearly how you obtained your answer.
(If you were unable to calculate the enthalpy changes for Reactions 1 and 2, you should
assume that the value for Reaction 1 is – 444 kJ mol –1 and that the value for Reaction 2 is
– 504 kJ mol –1 . Note: these are not the correct values.)
Answer this please!!!
Cu(s) + H 2 SO 4 (aq) → CuSO 4 (aq) + H 2 (g)
Reaction 3
(f) Use your values for the enthalpy changes for Reactions 1 and 2 to calculate the enthalpy
change for Reaction 3.
Mg(s) + H 2 SO 4 (aq) → MgSO 4 (aq) + H 2 (g) Reaction 1
Mg(s) + CuSO 4 (aq) → MgSO 4 (aq) + Cu(s) Reaction 2
Show clearly how you obtained your answer.
(If you were unable to calculate the enthalpy changes for Reactions 1 and 2, you should
assume that the value for Reaction 1 is – 444 kJ mol –1 and that the value for Reaction 2 is
– 504 kJ mol –1 . Note: these are not the correct values.)
Answer this please!!!
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Which year and variant?
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winter 14 variant 31
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any inputs on the qualitative analysis please ?
ok bro
awwww poor soul
omg shut up this is for chem!!!
sure
lol please tell! thanks!
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- 33
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Let the predictions roll from now on AND i want everybody with knowledge to share it cos night time isn't exactly useful(that doesn't mean you can't)
Salt Analysis and the intention behind H2O2 and starch are needed
)Salt Analysis and the intention behind H2O2 and starch are needed
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the one guy who knows it wont tell cause he thinks he might get banned xDLet the predictions roll from now on AND i want everybody with knowledge to share it cos night time isn't exactly useful(that doesn't mean you can't
Salt Analysis and the intention behind H2O2 and starch are needed
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No you must not leak it, You must PREDICT it
Plus do you really think that THAT guy won't know how to, such people are very smart and may be holding prime positions in the future
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according to the picture Hassan (SHT) posted (thanks by the way), I think copper, sulfate and carbonate ions will be coming.
Guys please tell about errors and uncertainties!! what should i know?
I know about percentage error one.. where (smallest division of instrument x number of readings taken)/reading taken x100.. what else is required?
Guys please tell about errors and uncertainties!! what should i know?
I know about percentage error one.. where (smallest division of instrument x number of readings taken)/reading taken x100.. what else is required?
Are these for test analysis (qualitative analysis)
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No they could be from any part of question