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Topic: Calibration curve, is this correct? Melting point experiment?  (Read 5015 times)

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Offline THISMOMENTISFATE

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Calibration curve, is this correct? Melting point experiment?
« on: January 19, 2011, 04:30:12 PM »
ive asked a bunch of people but no one seems to know the answer, can someone please help me?

im suck on part II, so you can just read that part if you like.

we did an experiment where,

week one we did a graph with the melting points of different compounds.
week 2 we used the graph to correct the melting point of unknown # 1 and then unknown # 2
we mixed unknown 2 with other compounds to determine what it is.

now i have to state what the calibration curve is but the teacher did not explain. how do i do this?
we find one unknown and its melting point

this is what my lab report looks like (minus the graph of the first part)

im stuck on part II


I.
A. unknown 1
melting point range (uncorr) 50.0-53.0
melting point range (corr) 50.2-53.2 (because of graph from part 1 of experiment)
melting point average 51.7

b unknown 2
melting point range (uncorr) 65.0-67.0
melting point range (corr) 65.6-67.6 (because of graph from part 1 of experiment)
melting point average 66.6

mix melting point range of unknown 2 with

compount mp range
benzhydrol 65.0-67.0
phenylbenzoate 63.0-70.0
bephenyl 67.0-69.0

unknown 2 is benshydrol

II.
include your calibration curve with this report. after the calibration curve is returned to you, tape it in your lab notebook

how do I do this??? is there some kind of formula? the teacher did not explain

someone told me to use melting point average 51.7 as my calibration curve, is this correct? i got that number by using a graph i created from the first part of this experiment.

Offline DevaDevil

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Re: Calibration curve, is this correct? Melting point experiment?
« Reply #1 on: January 20, 2011, 10:43:43 AM »
I find the request of a "calibration curve" strange in this aspect, because -based on your information to us- you have 2 unknown compounds, did a series of melting point experiments on those compounds, then found the melting points of those compounds with a margin of error. Is this correct?

I fail to see which graph you made out of this though?

what is on the x and y axis of that graph?

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