3. The concentration of acetylsalicylic acid, C9H8O4, in aspirin tablets is determined by hydrolyzing it to the salicylate ion, C7H5O3, and determining its concentration spectrofluorometrically. A stock standard solution is prepared by weighing 0.0774g of salicylic acid, C7H6O3, into a 1-L volumetric flask and diluting to volume. A set of calibration standards is prepared by pipeting 0,2.00,4.00,6.00,8.00, and 10.00mL of the stock solution into separate 100 -mL volumetric flasks that contain 2.00mL of 4MNaOH and diluting to volume. Fluorescence is measured at an emission wavelength of 400nm using an excitation wavelength of 310nm with results shown in the following table. (a) (2 pts.) Why is the excitation wavelength (310nm) shorter than the emission wavelength (400nm) ? (b) (2 pts.) How is the emission wavelength isolated from the excitation wavelength in a fluorescence instrument? (c) (6 pts.) Several aspirin tablets are ground to a fine powder in a mortar and pestle. A 0.1013-g portion of the powder is placed in a 1-L volumetric flask and diluted to volume with distilled water. A portion of this solution is filtered to remove insoluble binders and a 10.00mL aliquot transferred to a 100mL volumetric flask that contains 2.00mL of 4MNaOH. After diluting to volume the fluorescence of the resulting solution is 8.69. What is the percent weight of acetylsalicylic acid in the aspirin tablets