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a) For the multipoint method, if you analyzed the calibration standards at 430 nm instead of 527 nm, explain why and how this would affect the slope of the calibration curve. (See Figure 5 for the qualitative absorbance spectrum of a sodium salicylate solution). b) If the unknown face wash samples were also analyzed at 430 nm, would you expect your mean concentration of salicylic acid in the unknown sample to be the same or different from that determined at 527 nm? Fully explain your answer. a) If the colour of the unknown face wash replicate samples was somewhat lighter than the colour of standard 1, the determination for the concentration of salicylic acid may not be accurate. Fully explain why. b) Fully explain one way in which you could change the procedure to correct for this. a) For the multipoint method, if you analyzed the calibration standards at 430 nm instead of 527 nm, explain why and how this would affect the slope of the calibration curve. (See Figure 5 for the qualitative absorbance spectrum of a sodium salicylate solution). b) If the unknown face wash samples were also analyzed at 430 nm, would you expect your mean concentration of salicylic acid in the unknown sample to be the same or different from that determined at 527 nm? Fully explain your answer. a) If the colour of the unknown face wash replicate samples was somewhat lighter than the colour of standard 1, the determination for the concentration of salicylic acid may not be accurate. Fully explain why. b) Fully explain one way in which you could change the procedure to correct for this