Please show equations, values, and steps. Thank you Question 2. Determining the

Question

Please show equations, values, and steps. Thank you

Question 2. Determining the Molar Absorptivity (4 p). You wish to determine the molar absorptivity (E) for another food dye. Using only the data below, find for this dye by constructing an absorbance versus concentration plot. Properly scale the plot if necessary. The slope of this plot is E. Include the R2 value and the equation of the linear trend-line (both from Excel). You will likely need to adjust the sig figs for the equation of the linear trend-line and R2 in Excel. Properly title the plot and label the axes correctly. Paste-in the plot used to find E. State your value (the slope). Use correct sig figs and units. You are expected to remember this format in all subsequent lab work without being prompted again. Absorbance Concentration (M) 0.818 0.611 0.389 0.239 0.053 6.54 x 10-5 4.81 x 10-5 3.27 x 10-5 1.74 x 105 4.32 x 106

Explanation / Answer

According to Lambert- beers law-

                                      A=Cl        (A=absorbane, =absoptivity, C=concentration and l=path length)

So plot of A vs C would give a straight line with slope equal to l. Now, in general, l is equal to 1cm. So slope of the straight line is equal to .

From the graph, it can be seen that slope is equal to 1.24×104. So si equal to 1.24×104 M-1cm-1

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