If the absorbance of a 1.24 x 10-6M solution is 0.134, what absorbance at the same wavelength do you expect for a 8.20 x 10-7M solution of the same species?
a. 0.089
b. 0.661
c. 0.203
d. 0.066
If the absorbance of an Erythrosin B solution is 0.350 at 480 nm, what will its absorbance be at 525 nm?
a. less than 0.350
b. equal to 0.350
c. greater than 0.350
2007-03-06 14:33:39 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
~Neither can be answered without a stated temperature and atmospheric pressure.
2007-03-06 14:37:11 · answer #1 · answered by Oscar Himpflewitz 7 · 0⤊ 1⤋
Applying Beer's Law Abs proportional Conc
Abs = 8.2 x 10^-7 / 1.24 x 10^-6 x 0.134 = 0.089
Answer a
To answer the second question you will need some knowledge of the absorption spectrum over the wavelengths indicated. The answer (without any other information) could be all of the above.
2007-03-07 04:09:49 · answer #2 · answered by A S 4 · 0⤊ 1⤋
I would use Beer's Law for the first one, solving for the molar absorptivity and then plug that into the second equation. the answer is a.)
I have a guess that it wil be c.) for the second question but not sure why.
2007-03-06 22:43:33 · answer #3 · answered by brian_holinsworth1 2 · 0⤊ 1⤋