Chapter 19, Problem 19.82QP

(a)

Interpretation Introduction

Interpretation:

The gas produced at the cathode and its volume in $\text{STP}$ has to be calculated. And the value of Avogadro number also has to be calculated.

Concept Introduction:

Hydrogen evolution reactions are electrochemical reactions which can result in the splitting of water and release of hydrogen gas in cathode.  The hydrogen thus evolved is used as in efficient fuels in various fields.

The amount of electrical charge that is passing through a circuit depends upon the amount and time of the flow of current.  The electrical charge is measured in Coulomb.

  $\text{Q=}\frac{\text{I}}{\text{t}}$

Where,

  $\text{Q}$ is the charge in Coulomb

  $\text{I}$ is the current in Ampere

  $\text{t}$ is the time in second

Faradays First law of electrolysis says that the quantity of substance deposited on an electrode is proportional to the charge passed through the solution.

  $\text{m = Z}\times \text{Q}$

Where,

  $\text{m}$ is the amount of substance liberated

  $\text{Q}$ is the quantity of charge passed

  $\text{Z}$ is the electrochemical equivalence of the substance

(b)

Interpretation Introduction

Interpretation:

The gas produced at the cathode and its volume in $\text{STP}$ has to be calculated. And the value of Avogadro number also has to be calculated.

Concept Introduction:

Hydrogen evolution reactions are electrochemical reactions which can result in the splitting of water and release of hydrogen gas in cathode.  The hydrogen thus evolved is used as in efficient fuels in various fields.

The amount of electrical charge that is passing through a circuit depends upon the amount and time of the flow of current.  The electrical charge is measured in Coulomb.

  $\text{Q=}\frac{\text{I}}{\text{t}}$

Where,

  $\text{Q}$ is the charge in Coulomb

  $\text{I}$ is the current in Ampere

  $\text{t}$ is the time in second

Faradays First law of electrolysis says that the quantity of substance deposited on an electrode is proportional to the charge passed through the solution.

  $\text{m = Z}\times \text{Q}$

Where,

  $\text{m}$ is the amount of substance liberated

  $\text{Q}$ is the quantity of charge passed

  $\text{Z}$ is the electrochemical equivalence of the substance