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tlburnett
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This is my question: What is the concentration of a solution with an absorbance of 0.526

the calibration curve is y=2.44x-0.0275

if some one could explain this to me, that'd be awesome.

9/8/2011 8:36:03 AM

PaulISdead
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You have got to be kidding

9/8/2011 9:29:46 AM

Wraith
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Send a PM to GreatGazoo, he's usually pretty good at helping people out with Chemistry stuff.

9/8/2011 10:04:40 AM

tlburnett
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thank you for not being an ass

9/8/2011 11:26:37 AM

dropdeadkate
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assuming you graphed absorbance vs concentration (so x-values are absorbance and y-values are concentration) then you just plug in the absorbance of 0.526 in for the x in the curve formula and w/e y ends up being is your concentration value

if you are any kind of chemistry major I AM DISAPPOINT, but if not then yea thats how you do it

9/8/2011 1:05:31 PM

mildew
Drunk yet Orderly
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Zoology

9/8/2011 1:14:22 PM

GreatGazoo
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Quote :
"Send a PM to GreatGazoo, he's usually pretty good at helping people out with Chemistry stuff.

"


And so it begins ...

Umm, as for the linear fit, Beer's Law is A = elC so the y = mx + b fit would suggest that one is plotting Absorbance as the dependent variable along the ordinate and the concentration as the independent variable along the abscissa. If the OP is in sections 001 or 002, I'm pretty certain that we discussed this procedure in class at the board.

Quote :
"thank you for not being an ass"
oh, the irony.

[Edited on September 8, 2011 at 4:56 PM. Reason : ..]

9/8/2011 4:48:49 PM

PaulISdead
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The units would set you free

9/8/2011 5:13:01 PM

catalyst
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Quote :
"ORDINATE

AND

ABSCISSA"

9/8/2011 5:25:28 PM

dropdeadkate
nerdlord
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so basically I said exactly what warren said, but really dumbed down so that the dude had a chance in hell of understanding what was being said

come on teach, no one calls them the ordinate and abciscoausfsjd;fkaslkdgjaaaaaaa

ENJOY YOUR SEMESTER OP

9/8/2011 7:45:20 PM

GreatGazoo
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^
Quote :
"so x-values are absorbance and y-values are concentration"


DDK: I didn't say this initially (trying to be polite), but what you wrote initially was inverted; the absorbance would be the y-values, and the concentrations the x-values. I actually thought that I was "teaching" - this is Study Hall after all - by using the formal terms since "x" and "y" are, after all, just labels. Perhaps I failed just like so many of my jokes.


http://www.youtube.com/watch?v=7kdrsPRZnK8


[Edited on September 8, 2011 at 7:57 PM. Reason : ..]

[Edited on September 8, 2011 at 8:08 PM. Reason : add link]

9/8/2011 7:55:56 PM

wdprice3
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Quote :
"oh, the irony."

9/8/2011 8:10:14 PM

catalyst
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GreatGazoo

WHO KNOWS I KNOW THE QUALITY OF THIS USER

9/8/2011 8:54:06 PM

dropdeadkate
nerdlord
11725 Posts
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lawl

this is what i get for trying to remember shit off the top of my head

no but warren is right don't listen to me

9/9/2011 12:36:51 PM

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