(a) Interpretation: The concentrations of A and B in solution should be determined that yielded absorbance 0.439 at 475 nm and 1.025 at 700 nm. Concept introduction: The Beer-Lambert Law is: A = ε l c A − absorbance ε - molar absorptivity l − length of the solution light passes through (cm) c − concentration of solution (mol/L)

Question

When measured in a 1-cm cell, an 8.50 x 10-5 M solution of species A exhibited absorbances of 0.129 and 0.764 at 475 and 700 nm, respectively. A 4.65 x 10-5 M solution of species B gave absorbances of 0.567 and 0.083 under the same circumstances. Calculate the concentrations of A and B in solutions that yielded the following absorbance data in a 1.25 cm cell : 0.502 at 475 nm and 0.912 at 700 nm. Pls answer need help.

Answer 1

Question

Chapter 14, Problem 14.9QAP

Interpretation Introduction

(a)

Interpretation:

The concentrations of A and B in solution should be determined that yielded absorbance 0.439 at 475 nm and 1.025 at 700 nm.

Concept introduction:

The Beer-Lambert Law is:

A=εlc

A − absorbance

ε - molar absorptivity

l − length of the solution light passes through (cm)

c − concentration of solution (mol/L)

Interpretation Introduction

(b)

Interpretation:

The concentrations of A and B in solution should be determined that yielded absorbance 0.662 at 475 nm and 0.815 at 700 nm.

Concept introduction:

The Beer-Lambert Law is:

A=εlc

A − absorbance

ε - molar absorptivity

l − length of the solution light passes through (cm)

c − concentration of solution (mol/L)

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When measured in a 1-cm cell, an 8.50 x 10-5 M solution of species A exhibited absorbances of 0.129 and 0.764 at 475 and 700 nm, respectively. A 4.65 x 10-5 M solution of species B gave absorbances of 0.567 and 0.083 under the same circumstances. Calculate the concentrations of A and B in solutions that yielded the following absorbance data in a 1.25 cm cell : 0.502 at 475 nm and 0.912 at 700 nm. Pls answer need help.

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