Electrolytic Cells And Electrolysis
Chapter Name : Electrochemistry |
Sub Topic Code : 102_12_03_06_01 |
Topic Name : Electrolytic Cells And Electrolysis |
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Sub Topic Name : Quantitative Aspects- Faraday's Laws |
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Introduction
o
The phenomenon of chemical
change due to passage of electrical energy from an external source is called
electrolysis. Also the cells used to carry out electrolysis are called
Electrolytic Cells.
o
Faraday’s 1st law
states that the mass of a substance produced by electrolysis is proportional to
the quantity of electricity used.
Faraday’s 2nd law states
that the mass of different substances, liberated by the same amount of
electricity are proportional to their equivalent masses.
Pre-Requisites:
Redox reactions
Activity:
Li ion batteries have an electrolytic cell
structure
Real Life Question:
What is electrolysis?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Electrolysis | The phenomenon of chemical change due to passage of electrical energy from an external source. |
| Electrolytic cells | A cell which undergoes chemical reaction when electrical energy is applied. |
| Faraday(or Faraday constant) | The quantity of electricity required for producing 1 mole of substance. 1 F = 96500 C mol–1 |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Chlorine, bleach | These are made by electrolysis of chlorides. |
Real life uses :
1. Electroplating on metals
2. Electrorefining of metals
Places to visit :
home
Practical examples around us
| Examples | Explainations |
|---|---|
| Production of Na metal | Sodium is produced by electrolysis of its chlorides. |
| Electroplating of metals | It is the process of coating an inferior metal with a superior metal by electrolysis for protection of metals. |
What you learn in Theory:
Laws governing
electrolysis
What you learn in Practice:
Applications of
electrolysis