Using the fact that at 0.10 M, the absorbance was 0.357; and at 0.20 M, the absorbance was 0.714, the absorptivity (slope) is Blank 1

(answer to 2 dec places). Using your absorptivity, if an absorption of 0.250 is measured, the concentration is

Blank 2

M (answer to 2 dec places)