Construct a calibration curve: (a) Subtract the blank value (9.1) from all other values (this means that your first data point will be 0,0). Then use the LINEST calculation of least squares to find the slope and intercept and their uncertainties. slope 869 intercept (b) Replicate measurements of an unknown gave 152.1, 152.4, 153.9, and 152.7 mV, and a blank gave 9.1, 9.4, 10.6, and 9.0 mV. Subtract the average blank from the average unknown to find the average corrected signal for the unknown. 143.25 Check the number of significant figures. (c) Find the concentration of the unknown and its uncertainty.
Construct a calibration curve: (a) Subtract the blank value (9.1) from all other values (this means that your first data point will be 0,0). Then use the LINEST calculation of least squares to find the slope and intercept and their uncertainties. slope 869 intercept (b) Replicate measurements of an unknown gave 152.1, 152.4, 153.9, and 152.7 mV, and a blank gave 9.1, 9.4, 10.6, and 9.0 mV. Subtract the average blank from the average unknown to find the average corrected signal for the unknown. 143.25 Check the number of significant figures. (c) Find the concentration of the unknown and its uncertainty.
Chapter4: Least-squares And Calibration Methods
Section: Chapter Questions
Problem 9P
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