Posted by jen on Saturday, April 2, 2011 at 5:12pm.
can someone please explain to me in dummy language this question... Why is the graph of transmittance versus concentration not linear?...
Thankyou very much

chemistry  DrBob222, Saturday, April 2, 2011 at 5:47pm
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.

chemistry  bobpursley, Saturday, April 2, 2011 at 5:51pm
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

chemistry  nada, Tuesday, October 2, 2012 at 12:26pm
why is the hydrous copper sulfate heated to constant weight?
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