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how to calculate the percentage error? in my mock i Did 0.05 multiply by 2 (as two reading from burette) and divide by hundered mulitply by the Reading of burette but i got zero. marks.
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trying to use imagination and solving past papers xDur welcome ... how r u guys preparing for practical ?
lol ok .. so u were doing that imagining a test tube in ur hand and taking its mass HAHAHAHAtrying to use imagination and solving past papers xD
haha didn't reach the test tube part yet. I remember taking the mass in kind of a tiny bucket. Done this one in the lab. xDlol ok .. so u were doing that imagining a test tube in ur hand and taking its mass HAHAHAHA
wt i know is u r suppose to write the s.f according to question .. if in question there r two s.f thn we will write 2 s.fHere's another question. How many significant figures are to be used in calculations and in table of data??
got it . Thanks a lotwt i know is u r suppose to write the s.f according to question .. if in question there r two s.f thn we will write 2 s.f
Ok thanks a bunchIt an be a 10cm3 pipette used twice or a burette or a measuring cylinder
You dont need to learn the table for the tests of ions. Its always given!Two more questions on Chemistry paper 3:
when we use a different method of molar calculation than the one given in the marking scheme, and our answers are correct, do we get the marks then??
Second question, this might sound silly but, do we have to learn the table of test for ions??
memorizing them will help u to save time though, but it is always given its all up to u if u wanna memorize it or not and for the first question u asked i was gonna ask the same question and i also want to know how to draw a line of neutralization to determine the volume used blabla on the graph? do uk how?Two more questions on Chemistry paper 3:
when we use a different method of molar calculation than the one given in the marking scheme, and our answers are correct, do we get the marks then??
Second question, this might sound silly but, do we have to learn the table of test for ions??
it was a recent one..i think june 2011 or may be one in 2010I remember one paper too where they asked to test for Aldehyde and Ketone, but I don't think it was a recent one.
aoa wr wbcan any 1 explain me what is a rough titration!!!!
given in 2011 may/june.
aoa wr wb
it's like u just add the solution from the burette faster...and roughly get to know where's the end point... instead of adding drop by drop..
so if ur rough titre is around 23 for example..
then when u do it next, an accurate one..u can add 20 cm^3 directly..and then start to add drop by drop
That's not allowed on the forum..(asking about what's coming) so better be careful..!been asking the same question. but no one is answering?
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