Calculate the standard deviation of the slope and intercept

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Reference no: EM131083568

The method developed in Problem 14-11 was used for the routine determination of iron in 25.0-mL aliquots of groundwater. Express the concentration (as ppm Fe) in samples that yielded the accompanying absorbance data (1.00-cm cell). Calculate the relative standard deviation of the result. Repeat the calculation assuming the absorbance data are means of three measurements.

Problem 14-11

A standard solution was put through appropriate dilutions to give the concentrations of iron shown below. The iron(II)-1,10,phenanthroline complex was then formed in 25.0·mL aliquots of these solutions, following which each was diluted to 50.0 mL. The following absorbances (1.00-cm cells) were recorded at 510 nm:

(a) Plot a calibration curve from these data.

(b) Use the method of least squares to find an equation relating absorbance and the concentration of iron(II).

Reference no: EM131083568

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