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A) If you were measuring the absorption of a green pigment,

what wavelength would you predict the lowest absorption values?

  • red
  • blue
  • purple
  • orange

B) You are conducting an experiment using a spectrophotometer and are measuring two blue solutions at the appropriate wavelength and comparing their absorption values. For solution 1, you obtain an absorbance of 0.21 and for solution 2, you obtain an absorbance of 0.06. You conclude that solution 1 is more concentrated than solution 2. How would you describe the results?

  •  A. relative concentrations of the solutions
  •  B. absolute concentrations of the solutions

C) True or False: You can make a more dilute solution from a concentrated stock but you cannot make a more concentrated solution from a stock solution.

D) You would like to make a standard concentration curve for a purple indicator dye. Which of the following would you need to do? 

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