A liquid sample was analyzed for Fe³+. A plot of absorbance (y-axis) vs. concentration (ppm; x-axis) of the external standards produced a calibration line with an equation y = 0.2256x-0.0903 (R² = 0.9973). The absorbance of the sample was 1.25. Determine the amount of Fe³+ in the sample (in ppm).

A liquid sample was analyzed for Fe³+. A plot of absorbance (y-axis) vs. concentration (ppm; x-axis) of the external standards produced a calibration line with an equation y = 0.2256x-0.0903 (R² = 0.9973). The absorbance of the sample was 1.25. Determine the amount of Fe³+ in the sample (in ppm).

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Chapter9: Atomic Absorption And Atomic Fluorescence Spectrometry

Section: Chapter Questions

Problem 9.22QAP: The chromium in an aqueous sample was determined by pipetting 10.0 ml. of the unknown into each of...

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Question

A liquid sample was analyzed for Fe³+. A plot of absorbance (y-axis) vs. concentration
(ppm; x-axis) of the external standards produced a calibration line with an equation
y = 0.2256x -0.0903 (R² = 0.9973). The absorbance of the sample was 1.25. Determine
the amount of Fe³+ in the sample (in ppm).

Expert Solution

Step 1: Describing the given data

Given that,

a liquid sample was analyzed for Fe³⁺.

A plot of absorbance (y-axis) vs. concentration (ppm; x-axis) of the external standards produced a calibration line with an equation

y = 0.2256x - 0.0903 (R² = 0.9973)

The absorbance of the sample was 1.25

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