Principles of Instrumental Analysis
Principles of Instrumental Analysis
7th Edition
ISBN: 9781305577213
Author: Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher: Cengage Learning
Question
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Chapter 23, Problem 23.13QAP
Interpretation Introduction

(a)

Interpretation:

The theoretical potential of the cell SCE || Fe3+(0.0150 M), Fe2+(0.0250 M)| Pt should be calculated.

Concept introduction:

Nernst equation gives the cell potential under non-standard conditions.

E=E02.303RTnFlogQ

E − cell potential

E0 − standard cell potential

R − universal gas constant

T − temperature in Kelvin

n − number of electrons transferred

F − Faraday constant

Q − Reaction quotient

Ecell=Ecathode0Eanode0

Interpretation Introduction

(b)

Interpretation:

The theoretical potential of the cell SCE || Zn2+(0.00135 M)| Zn should be calculated.

Concept introduction:

Nernst equation gives the cell potential under non-standard conditions.

E=E02.303RTnFlogQ

E − cell potential

E0 − standard cell potential

R − universal gas constant

T − temperature in Kelvin

n − number of electrons transferred

F − Faraday constant

Q − Reaction quotient

Ecell=Ecathode0Eanode0

Interpretation Introduction

(c)

Interpretation:

The theoretical potential of the cell Saturated Ag/AgCl reference || Ti3+(0.0450 M), Ti2+(0.0250 M)| Pt should be calculated.

Concept introduction:

Nernst equation gives the cell potential under non-standard conditions.

E=E02.303RTnFlogQ

E − cell potential

E0 − standard cell potential

R − universal gas constant

T − temperature in Kelvin

n − number of electrons transferred

F − Faraday constant

Q − Reaction quotient

Ecell=Ecathode0Eanode0

Interpretation Introduction

(d)

Interpretation:

The Theoretical potential of the cell Saturated Ag/AgCl reference || I3(0.00667 M), I(0.00433 M)| Pt should be calculated.

Concept introduction:

Nernst equation gives the cell potential under non-standard conditions.

E=E02.303RTnFlogQ

E − cell potential

E0 − standard cell potential

R − universal gas constant

T − temperature in Kelvin

n − number of electrons transferred

F − Faraday constant

Q − Reaction quotient

Ecell=Ecathode0Eanode0

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The standard reduction potential of the zinc cation is -0.76 V. The measured cell potential for the cell Zn(s) | Zn2+ (aq) || H+ (aq, 1 M) | H₂ (g, 1 bar) | Pt(s) is 0.81V at 25°C. What is the concentration of Zn2+ (aq) (in mol L-¹)? 0.02 02 O 0.1 04 07
For the cell Zn(s) | Zn2+(2M) | | Cu2+(0.5 M) | Cu(s)(a) Write equation for each half-reaction.(b) Calculate the cell potential at 25 °C.[Given: EZn2+/Zn= – 0.76 V; ECu2+/Cu= + 0 .34V]
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