   Chapter 4.9, Problem 4.14CYU

Chapter
Section
Textbook Problem

A solution of copper(II) ions has an absorbance of 0.418 when measured at 645 nm in a 1.0-cm cell. Using the following data, calculate the concentration of copper(II) ions in the unknown solution. Interpretation Introduction

Interpretation: The concentration of copper (II) ions in the given unknown solution should be calculated.

Concept Introduction:

• Concentration of solutions can be expressed in various terms; molarity is one such concentration expressing term.
Explanation

First the given absorbance and the concentration data are plotted as follows,

When x=0y is 0.011, therefore the y intercept is 0.011.

From this the equation of straight line the concentration is calculated as follows,

y =  mx + cy =13x + 0

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