Question

If a 0.10M solution of a colored substance has a maximum absorbance at 500nm and an absorbance at 0.26M at this wavelength, what will be the measures absorbance of a 0.20M solution at 500nm?

Answer 1

use beer's law, twice.\[Abs = \epsilon *b*C\]

the first set of conditions lets you find \(\epsilon\). The second solution gives you an absorbance and asks you to find C. You use the same \(\epsilon\) for the second case that you found for the first case