
Why does the mercury cell have a constant cell potential throughout its useful life?
Answer
161.1k+ views
Hint: The cell potential of any cell is maintained by the movement of ions. If the ions are used up completely the cell potential will become zero and stop working.
Complete Step by Step Solution:
Silver \[\left( {Ag} \right)\]is a significantly less reactive metal due to which it does not easily undergo corrosion and does not easily oxidise
.
When Silver comes in contact with air it forms a silver oxide \[\left( {A{g_2}O} \right)\] which when comes in contact with hydrogen sulphide \[\left( {{H_2}S} \right)\], a black silver sulphide \[\left( {A{g_2}S} \right)\] layer is formed on the surface of the silver.
The chemical reaction for the oxidation of silver can be written as
\[2Ag + {O_2} \to A{g_2}O\]
\[A{g_2}O + {H_2}S \to A{g_2}S + {H_2}O\]
Thus, when a black silver sulphide \[\left( {A{g_2}S} \right)\] layer is formed on the surface of the silver we can recognize that silver gets corroded.
The corrosion of silver can be prevented by avoiding exposure to an open place that absorbs moisture and tarnishes silver.
Additional information: If corrosion occurs in iron it is called rusting of iron. When iron is exposed to air and moisture, it forms a layer of iron oxide which is rust. Rust chemically is hydrated iron (lll) oxide \[F{e_2}{O_3}.{H_2}O\].
Rusting of iron can be prevented by galvanization and paintings. Galvanization is the process of applying the coating of zinc which prevents the oxidation of iron.
Note: Generally, in a dry cell the cell constant is maintained due to the movement of ions that after a certain period of time completely use up and stop working.
Complete Step by Step Solution:
Silver \[\left( {Ag} \right)\]is a significantly less reactive metal due to which it does not easily undergo corrosion and does not easily oxidise
.
When Silver comes in contact with air it forms a silver oxide \[\left( {A{g_2}O} \right)\] which when comes in contact with hydrogen sulphide \[\left( {{H_2}S} \right)\], a black silver sulphide \[\left( {A{g_2}S} \right)\] layer is formed on the surface of the silver.
The chemical reaction for the oxidation of silver can be written as
\[2Ag + {O_2} \to A{g_2}O\]
\[A{g_2}O + {H_2}S \to A{g_2}S + {H_2}O\]
Thus, when a black silver sulphide \[\left( {A{g_2}S} \right)\] layer is formed on the surface of the silver we can recognize that silver gets corroded.
The corrosion of silver can be prevented by avoiding exposure to an open place that absorbs moisture and tarnishes silver.
Additional information: If corrosion occurs in iron it is called rusting of iron. When iron is exposed to air and moisture, it forms a layer of iron oxide which is rust. Rust chemically is hydrated iron (lll) oxide \[F{e_2}{O_3}.{H_2}O\].
Rusting of iron can be prevented by galvanization and paintings. Galvanization is the process of applying the coating of zinc which prevents the oxidation of iron.
Note: Generally, in a dry cell the cell constant is maintained due to the movement of ions that after a certain period of time completely use up and stop working.
Recently Updated Pages
Two pi and half sigma bonds are present in A N2 + B class 11 chemistry JEE_Main

Which of the following is most stable A Sn2+ B Ge2+ class 11 chemistry JEE_Main

The enolic form of acetone contains a 10sigma bonds class 11 chemistry JEE_Main

The specific heat of metal is 067 Jg Its equivalent class 11 chemistry JEE_Main

The increasing order of a specific charge to mass ratio class 11 chemistry JEE_Main

Which one of the following is used for making shoe class 11 chemistry JEE_Main

Trending doubts
JEE Main 2025 Session 2: Application Form (Out), Exam Dates (Released), Eligibility, & More

JEE Main 2025: Derivation of Equation of Trajectory in Physics

Electric Field Due to Uniformly Charged Ring for JEE Main 2025 - Formula and Derivation

Displacement-Time Graph and Velocity-Time Graph for JEE

Degree of Dissociation and Its Formula With Solved Example for JEE

Free Radical Substitution Mechanism of Alkanes for JEE Main 2025

Other Pages
JEE Advanced Marks vs Ranks 2025: Understanding Category-wise Qualifying Marks and Previous Year Cut-offs

JEE Advanced 2025: Dates, Registration, Syllabus, Eligibility Criteria and More

JEE Advanced Weightage 2025 Chapter-Wise for Physics, Maths and Chemistry

NCERT Solutions for Class 11 Chemistry In Hindi Chapter 1 Some Basic Concepts of Chemistry

NCERT Solutions for Class 11 Chemistry Chapter 7 Redox Reaction

JEE Advanced 2025 Notes
