Use computer graphing software to plot your data and run a linear regression

Use computer graphing software to plot your data and

This preview shows page 5 - 7 out of 8 pages.

1. Use computer graphing software to plot your data and run a linear regression analysis to evaluate your standard curve. Print your graph and be sure you include the equation for your linear-regression and the value of the linear regression correlation coefficient. 2. What statistical indicator convinces you that your data is trustworthy? Justify your answer. 3. Determine the concentration of the unknown solution. Justify your answer. 4.Beer’s Law appears in the “Gases, Liquids and Solutions” section of the AP Chemistry Formula Sheet as A = abcbut is more commonly seen in reference material as Acε=l. Either way A= absorbance, a or ε= molar absorptivity (a constant specific to each solution), bor l= path length of the cuvette in which the sample is contained, and c= concentration in mol/L or molarity. Calculate the concentration of a solution having an absorbance equal to 0.600 and a molar absorptivity constant of 5.00 × 103cm1M 1with a path length of 1.0 cm. 5.A student fails to insert the cuvette into the colorimeter or spectrophotometer correctly. What effect will this have on the measured absorbance?
Image of page 5