Understanding The Chemical Properties Of Acids And Bases
Chapter Name : Acids Bases And Salts |
Sub Topic Code : 102_10_02_01_01 |
Topic Name : Understanding The Chemical Properties Of Acids And Bases |
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Sub Topic Name : Acids And Bases In The Laboratory |
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Introduction
Acids and bases give colour change to these indicators.
Pre-Requisites:
Acid and base sample, red and blue litmus paper , phenolphthalein indicator, methyl orange indicator.
Activity:
Colour changes are opposite with acids and bases . Find out chemical nature of different chemicals.
Real Life Question:
How do we identify if the substance is acidic or basic in the lab ? In how many ways ?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Acid + BLUE litmus Base + RED litmus Base + Phenophathalein Methyl orange + Base | Litmus turns red Litmus turns blue Phenophthalein turns pink It turns yellow |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Chemical substance | With the use of the above indicators, classify them into acids and bases. |
Real life uses :
To measure the liquids that we drink are acidic or basic .
Places to visit :
Your school lab
Practical examples around us
| Examples | Explainations |
|---|---|
| lemon | It’s acidic in nature |
What you learn in Theory:
Chemical nature of a substance.
What you learn in Practice:
Acids and bases have opposite behaviour.