Question

If the absorbance of the 200 μm solution is 0. 885, what should be the absorbance of the 25μm? write answer to three decimal places

Answer 1

l:optical path length

A 45 mM phosphate solution(solution A) had an absorbance of 1.012.

A = ε. l . C

1.012 = e. l.45 mM      

ε. l =0.002 mM

We can find the concentration of the second solution using the dilution rule.

C1. V1 = C2 . V2

45 mM . 11 mL = C2 . 20.0 mL

C2 = 25mM

The absorbance of the second solution is:

A = (ε . l). C

A = (0.002 mM½) . 25 mM = 0.55

(rounding off to 3 significant figure = 0.550)

Learn more about colors of light are absorbed: brainly.com/question/23938376

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