Question
A solution of 4 -methyl- 3 -penten- 2 -one in ethanol shows an absorbance of 0.52 at $236 \mathrm{nm}$ in a cell with a $1-\mathrm{cm}$ light path. Its molar absorptivity in ethanol at that wavelength is12,600. What is the concentration of the compound?
Step 1
Step 1: We start with Beer's law, which is given by the equation: \[A = \varepsilon \cdot l \cdot c\] where \(A\) is the absorbance, \(\varepsilon\) is the molar absorptivity, \(l\) is the path length, and \(c\) is the concentration. Show more…
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A solution of a compound in ethanol shows an absorbance of 0.52 at $236 \mathrm{nm}$ in a cell with a $1 \mathrm{cm}$ light path. Its molar absorptivity in ethanol at that wavelength is $12,600 \mathrm{M}^{-1} \mathrm{cm}^{-1} .$ What is the concentration of the compound?
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