   # Calculate the potential developed by a voltaic cell using the following reaction if all dissolved species are 0.015 M. 2 Fe 2+ (aq) + H 2 O 2 (aq) + 2 H + (aq) → 2 Fe 3+ (aq) + 2 H 2 O( ℓ ) ### Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640

#### Solutions

Chapter
Section ### Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640
Chapter 19, Problem 30PS
Textbook Problem
44 views

## Calculate the potential developed by a voltaic cell using the following reaction if all dissolved species are 0.015 M.2 Fe2+(aq) + H2O2(aq) + 2 H+(aq) → 2 Fe3+(aq) + 2 H2O(ℓ)

Interpretation Introduction

Interpretation:

The potential delivered by a voltaic cell using the following reaction has to be calculated if all dissolved species are 0.015 M.

2Fe2+(aq) + H2O2(aq) + 2H+(aq)  2Fe3+(aq) + 2H2O(l)

Concept introduction:

Electrochemical cells under nonstandard conditions:

Basically standard electrode potentials are determined at

1.00 M solution concentration

1.00 atm for gases

Pure liquids or solids

At 250C

Under the non –standard condition electrode potential can be calculated by using the Nernst equation.

According to the Nernst equation, the cell potentials are related to concentrations of reactants and products and to temperature as follows.

E = E0-(RTnF)lnQ

Let’s write an each variable in the Nernst equation.

R= Gas constant = 8.314j/k.molT= Temperature (K)n = number of moles of  transferred in between oxidizing and reducing agentsF = Faraday constant = 9.6648533289 × 104C/mol

At 298K the Nernst equation is as follows

E = E0 - 0.0257n lnQ at 298 K

### Explanation of Solution

Let’s write an each half cell reaction.

At anode:Oxiation : 2Fe2+(aq)  2Fe3+(aq) + 2e-(aq)At cathode:Reduction : H2O2(aq)+ 2H++2e(aq) 2H2O

The overall reaction:

Zn(s) + 2H2O(aq)  [Zn(OH)4]2-(aq) + H2(g)

Let’s calculate the Ecello value of the reaction.

Ecello= ECathode0- EAnode0= -1.77 V-(-0.771 V)= 0.999 V

Calculate the potential of the cell by using Nernst equation:

E = E0 - 0

### Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

#### The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Find more solutions based on key concepts
A person who exercises moderately for longer than 20 minutes begins to a. use less glucose and more fat for fue...

Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)

What makes up a system of units?

An Introduction to Physical Science

What is population genetics?

Human Heredity: Principles and Issues (MindTap Course List)

Match the term listed in Column A with its definition from Column B

Nutrition Through the Life Cycle (MindTap Course List)

In usually warm climates that experience a hard freeze, fruit growers will spray the frail trees with water, ho...

Physics for Scientists and Engineers, Technology Update (No access codes included)

What is meant by westward intensification? Why are western boundary currents so fast and deep?

Oceanography: An Invitation To Marine Science, Loose-leaf Versin 