5. Indigo is a blue dye: H. - H. a) Draw the line structure for indigo. b) Place an asterisk next to any chiral carbon atoms in your structure (if there are any). Explain your choice in 1-2 sentences. c) Label all of the functional groups in your indigo molecule. d) If you were trying to use titration to quantify the amount of indigo in a sample, would you use HCl or NAOH as your titrant? Explain your answer in 1-2 sentences. e) Roughly sketch the titration curve that would result from the analysis in part d. Don't forget to label your axes and any important points on the curve.