A b c a = = 0.30 abs (2.00 cm)(4.5 ppm) = 0.033 abs cm-1ppm-1 A solution of Co(H2O)2+has an absorbance of 0.20 at 530 nm in a 1.00 cm cell. $is known to be 10 L n-1cm-1. What is its concentration. A = abc Where: A = 0.20, a = 10, b = 1cm c = A / (ab) = 0.020 M The absorbance of an unknown MnO4-solution is 0.500 at 525 nm. When measured under
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