# can someone please explain to me in dummy language this question... Why is the graph of transmittance versus concentration not linear?...

Thankyou very much

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524339

Created
April 2, 2011 9:12pm UTC

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## 3 answers

1. I suppose the easiest way to look at that absorbance = A = abc and that is a linear graph. But A = log (1/T) so the graph of T versus concn can't be linear because it is a log term.

Answer ID
524346

Created
April 2, 2011 9:47pm UTC

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2. In dummy language, it is not linear because it is logarithmic by definition.

absorbance=constant*concentration=kc
which is linear with concentration.

but absorbance=10*log P/Po=
=10log 1/Transmittance
because transmittance=P/Po

which leads to T=e-k*concentration
Thus, it is not linear.

http://teaching.shu.ac.uk/hwb/chemistry/tutorials/molspec/beers1.htm

Answer ID
524349

Created
April 2, 2011 9:51pm UTC

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3. why is the hydrous copper sulfate heated to constant weight?

Answer ID
780909

Created
October 2, 2012 4:26pm UTC

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