This question has multiple parts. Work all the parts to get the most points A co

Question

This question has multiple parts. Work all the parts to get the most points 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-044; 3.5 ppm,A-0.5% and 45 ppm,A-0.70. (Use a spreadsheet to complete this question,) aFind the slope and intercept of the calibration curve, the standard error in Y, the concentration of the solution of unknown X concentration (-050), and the standard deviation in the concentration of x Slope- 0.115 ppm Intercept- 0.178 Standard error in Y Concentration of the solution of unknown X concentration-2 Standard deviation in the concentration of X- ppm

Explanation / Answer

slope = 0.115

intercept = 0.1785

standard error in Y =

concentration of unnkown X = 2.796

y =mx +c

x = y-c / m = 0.5 - 0.1785 / 0.115

x = 2.796 ppm

standard error in Y = standard deviation in Y / n^0.5  

= 0.1632 / (5)^0.5 = 0.073

standard error in Y = 0.073

standard deviation in concentration of X = 1.414 ppm

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