# A standard solution was put through appropriate dilutions to give the concentrations of iron shown..

A standard solution was put through appropriate dilutions to

give the concentrations of iron shown next. 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:

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A standard solution was put through appropriate dilutions to give the concentrations of iron shown..

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(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).

(c) Calculate the standard deviation of the slope and

intercept.