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Chemistry: Post your doubts here!
thank you so much if you are able to get a perfect scale and a good graph please do upload a picture of it, if it is ok :) -
Chemistry: Post your doubts here!
To calculate the con of succinate in water layer: Moles of NaOH=Moles of Succinate this is wrong. because 2 moles of NaOH reacts with 1 mole of the acid because the acid has 2 carboxylic groups not one. its so hard to find a scale for that graph.. -
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Mathematics: Post your doubts here!
it is possible if he got a very high B in p1 like few marks away from A and a high A in s1..then its super possible!! -
Mathematics: Post your doubts here!
dont think that way! one mark can actually help u to go from a B to an A :P -
Chemistry: Post your doubts here!
can u fill the table and draw the graph because i am stuck with this question too. i tried to do it yesterday and i spent hours on it but its so difficult to draw the graph -
What are the possible questions that might just be coming this year 2013_may/June _AS levels CIE
we r not god to know or even predict that :O:O -
Chemistry: Post your doubts here!
this question needs a master in chemistry to fill the table and draw the graph. check question 2 ppl SOOO HARD!!! http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w10_qp_53.pdf -
Chemistry: Post your doubts here!
it is SUPPOSED to be a yes but i don't know i mean "we" don't know why the mark scheme is the opposite of us in this -
Chemistry: Post your doubts here!
same thing happened to me PhyZac..worked with me perfectly with the cations but not with the anions :S:S -
Mathematics: Post your doubts here!
thanksss i needed them too! if u have some complex number notes then pls do send them too -
Mathematics: Post your doubts here!
CIE examiners r really experts because they know how even if u solved allll the past papers in the world for a subject, the one which u will do in the exam will be different to all of what u did and will be able to trick u! -
Mathematics: Post your doubts here!
ok i only remember the first part of this question because this is a tricky question so i can't get it out of my mind till this day see u have the total sum of all the terms formula given..if u substitute 1 in that formula it means u r finding the total sum of 1 term which is 9 so thats our... -
Chemistry: Post your doubts here!
using the other method that i showed u gives all of them correct values but i wonder why they dont give the same values with the potential electrodes if anyone here knows why or u know why then please do tell me because i want to know the reason now too.. -
Mathematics: Post your doubts here!
yeah i remember this question too. everyone was talking about the first part of this question when we did it last year. it was a tricky part and most difficult question on the paper! -
Chemistry: Post your doubts here!
ok see... O2/OH^- = 0.4V and F/F^- = 2.87 so OH ion is easier to be oxidized than F^- so O2 will form at the anode..got it ? BUT i don't know why the mark scheme gives a wrong answer to this method with Br not SO4 but for the cations it gives all the answers right..do u solve it that way too? -
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Chemistry: Post your doubts here!
u wanna know how to use the potential values to find the answer for AgF ? -
Chemistry: Post your doubts here!
i use a faster way of doing this question other than lookin at the potential values of the electrodes..use the reactivity series u learnt in ur igcse and any element below hydrogen in it is the one that will be reduced at the cathode and any element above the hydrogen then hydrogen ions from the... -