SPECTROPHOTOMETRIC DETERMINATION OF A SOLUBILITY PRODUCT CONSTANT LAB 9. Should the point, zero absorbance, and zero concentration, be included in this data set?

The following data are obtained from three standard soltions using UV-Vis spectroscopy:  What is the colar concentration (M) of an unknown solution with an absorbance of 0.180 at 255 nm? The unknown solution contains the same analyte as the standard solution does. The molar mass of the analyte is 188.65 g/mol a) 4.82x10-5b)1.9x10-3c)3.60x10-4d)1.9x10-5e)1.8x 10-4

What will be the corresponding concentration for a solution having an absorbance of 0.350 and a molar absorptivity of 420 L mol-1 cm-1. (path length = 1.0 cm)

The equilibrium constant for the conjugate acid/base pair is 8.0 x10-5 HIn + H₂O H3O+ + In. From additional information: Species Absorption Molar absorptivity Maximum, nm 430 nm 600 nm HIn 430 8.04×10³ 1.23x10³ In 600 0.775×103 6.96x103 (a) Calculate the absorbance at 430 nm and 600 nm for th following indicator concentrations: 3.0 x10-4 M, 2.0 × 10-4 M. and 1.0 ×10-4 M, 0.5 ×10-4 M and 0.25 ×10-4 M. (b) Plot absorbance as a function of indicator concentration. (c) Discuss the linearity of the graph of the two absorbance functions.