When the catalyst was at 0.1 mg/mL and the substrate concentration 16 MM, the initial rate of absorbance change was 0.006 absorbance units per second. The measured product has a molar extinction coefficient of 6220 M-1.cm-1, and the path length is the width of a cuvette; 1 cm. Required:
Using the information above, can you rearrange the Beer-Lambert equation to convert the absorbance change of rate into a rate of product formation and select the correct value below?

a. 0.8 M^-1.s^-1
b. 1.2 M^-1.s^-1
c. 1.2 M^-1.s^-1
d. 0.8 M^-1.s^-1

Salicylic acid is a very important acid. it is used to synthesize the aspirin by treating with acetic anhydride. a 0.2015-g sample of salicylic acid was dissolved in a 100.00-ml volumetric flask, and the solution was diluted to the mark. a 10-ml aliquot of this solution was titrated with standard naoh (0.01130 + 0.2% n) to a phenolphthalein faint pink color end point at 19.81 ml. (a) (calculate the normality of the salicylic acid solution used in the titration. (b) assuming the salicylic acid is pure, what is the equivalent weight of the salicylic acid? practice problems for the final exam (continued) (c) (calculate the inherent error in the determination of the equivalent weight you calculated in part (b). use the following absolute errors in the equipment /glassware when calculating the inherent error. 5.00-ml pipet: + 0.02 ml 100-ml volumetric flask: + 0.08 ml analytical balance: + 0.2 mg 25-ml buret: + 0.03 ml