Conductance Of Electrolytic Solutions
Chapter Name : Electrochemistry |
Sub Topic Code : 102_12_03_05_01 |
Topic Name : Conductance Of Electrolytic Solutions |
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Sub Topic Name : Conductance Of Electrolytic Solutions |
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Introduction
The electrical resistance ‘R’ is measured in ohm. It is directly proportional to its length, l, and inversely proportional to its area of cross section, A The inverse of resistance is conductance. The magnitude of conductivity depends on: • the nature of the material • The temperature and pressure at which the measurements are made.
Pre-Requisites:
Electrochemical cell, Daniel cell, voltage, electrolytic solutions
Activity:
Observe an electrical wire. See how it’s made and what’s it covered with.
Real Life Question:
Why is copper used to make electrical wires?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Electrolyte | Electrolyte is a solution which conducts electricity. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Electrical wire | Take an electrical wire and remove its outer case and see what the inside of the wire is made of. |
Real life uses :
Metal conductors. Such as copper is used to make wire, copper sulfate is a good electrolyte.
Places to visit :
Garage, switchboard
Practical examples around us
| Examples | Explainations |
|---|---|
| Electrical wire | Electrical wires are made of copper as copper is a good conductor of electricity. |
What you learn in Theory:
Conductance is the measure with which electricity is conducted, Resistivity is inverse of conductance.
What you learn in Practice:
Conductors allow passage of electricity whereas insulators do not allow passage of electricity.