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A compound X is to be determined by UV visible spectrophotometry A calibration curve is constructed from standard solutions of X with the following results 050 ppm A 024 15 ppm

A compound X is to be determined by UV-visible spectrophotometry. A calibration curve is constructed from standard solutions of X with the following. results: 0.50 ppm, A = 0.24; 1.5 ppm, A = 0.36; 2.5 ppm, A = 0.44; 3.5 ppm, = 0.59; 4.5 ppm, A = 0.70. A solution of unknown X concentration had an absorbance of A = 0.50. Find the slope and intercept of the calibration curve, the standard error in Y, the concentration of the solution of unknown X concentration, and the standard deviation in the concentration of X. Construct a plot of the calibration curve and determine the unknown concentration by hand from the plot. Compare it to that obtained from the regression line.

Jun 23 2020 View more View Less

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