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susb037prob3

# susb037prob3 - zero with 1 divided by 100 What is the...

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SUSB 037 – Problem 3 3. John Bier determines that the slope of the line representing the absorbance of a solution of Red 3 at its analytical wavelength as a function of concentration (in mg/L) is .066 L/mg. He measures the absorbance at the same wavelength of a solution of Red 3 of unknown concentration in the same cuvette and finds the absorbance is X, where X is the last two digits of your student ID (replace any
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Unformatted text preview: zero with 1) divided by 100. What is the concentration of Red 3 in the unknown solution? Suppose the last two digits of your ID are 52. The measured absorbance is then Abs = 52 / 100 = 0.52 Since the Beer’s Law slope is 0.066 L/mg, we know that Abs = 0.066 c (where c is in mg/L) or c = Abs / 0.066 Substituting the value of Abs gives us: c = 0.52 / 0.066 = 7.9 mg/L...
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