Question

If a sample of hexane with benzene had an absorbance of 0.153 at 256 nm in a cuvette with 1.000-cm path length, find the concentration of benzene in molarity.

Answer 1

A = abc
A = 0.153
a = absorptivity constant. I don't see that in the problem anywhere.
b = cell length = 1 cm
c = concentration.
Find a, plug in the values and solve for c.

Answer 2

i didn't get the answer, i don't know how to get absorptivity constant in the following given. I just research it, the formula is 𝐴 = − log 𝑇 something like that?

Answer 3

No. A is not a. You need the molar absorptivity constant to plug into the formula A = abc. You're correct that 𝐴 = − log 𝑇

Answer 4

So, how can i find the molar absorptivity constant in the given 0.153 at 256 nm and 1.000-cm path length. Can i get absorptivity constant with the given? so that i can now find the c in the A=abc, A/ab=c right?

Answer 5

Nvm, i already got it, thank you so much dr bob.