   # What volumes of H 2 ( g ) and O 2 ( g ) at STP are produced from the electrolysis of water by a current of 2.50 A in 15.0 min? ### Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243

#### Solutions

Chapter
Section ### Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243
Chapter 17, Problem 100E
Textbook Problem
5 views

## What volumes of H2(g) and O2(g) at STP are produced from the electrolysis of water by a current of 2.50 A in 15.0 min?

Interpretation Introduction

Interpretation:

The volumes of H2(g) and O2(g) that are produced at S.T.P. from the electrolysis of water when a given amount of current is passed for a given period of time are to be calculated.

Concept introduction:

The non-spontaneous reaction takes place in an electrolytic cell in which there occurs conversion of electrical energy into chemical energy and this is used for the electrolysis of a metal.

The charge generated in the cell is calculated as,

Q=It

When electricity is passed through an electrolytic cell, at that time the amount of the substance that is liberated at an electrode is given by,

W=ZQ=ZIt

The value of Z is given as,

Z=Atomicmassn×96,485

To determine: The volumes of H2(g) and O2(g) that are produced at S.T.P. from the electrolysis of water when a given amount of current is passed for a given period of time.

Volume of Hydrogen produced is calculated as 0.2778L_ .

### Explanation of Solution

Explanation

Given,

The temperature is given as 0°C .

The pressure is given as 1atm .

The given current is 2.50A .

The given time is 15.0min .

The reaction Hydrogen undergoes during electrolysis is,

2H++2eH2

The value of Z is given as,

Z=Atomicmassn×96,485=E96,485

Where,

• n is the number of electrons exchanged.
• E is the equivalent weight.
• Z is the electrochemical equivalent.

Substitute the values of atomic mass and n to obtain the value of the electrochemical equivalent of H2 .

Z=2gmol2e×96,485CmoleZ=1gmole96,485Cmole=1.0×105g/C

When electricity is passed through an electrolytic cell, at that time the amount of the substance that is liberated at an electrode is given by,

W=ZQ=ZIt

Where,

• Q is the charge carried into the cell.
• I is the current in amperes.
• t is the time for which current is passed through the cell.

Substitute the value of Z , I and t in the above equation to obtain the amount of substance liberated at the electrode,

W=1.0×105gC×2.5Cs×900s=0.0248g

The volume occupied by 2.0g of H2 at S.T.P. is 22.4L .

The volume occupied by 1.0g of H2 at S.T.P. is 22.4L2g .

The volume occupied by 0.0248g of H2 at S.T.P. is,

=11.2gL×0.0248g=0.2778L_

Volume of Hydrogen produced is calculated as 0.2778L_ .

The mass of potassium that is produced is 29.17g_

Explanation

Given,

The temperature is given as 0°C

### 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
Define density. Describe some uses of density.

General Chemistry - Standalone book (MindTap Course List)

LDL, a class of lipoprotein, delivers triglycerides and cholesterol from the liver to the bodys tissues. T F

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

7-30 Write the equilibrium expression for this reaction:

Introduction to General, Organic and Biochemistry

What are the products of triglyceride digestion?

Chemistry for Today: General, Organic, and Biochemistry

With ______, one species evolves to look like another.

Biology: The Unity and Diversity of Life (MindTap Course List)

A potential energy function for a system in which a two-dimensional force acts is of the form U = 3x3y 7x. Fin...

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

Trace the life of a typical star.

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