More About Salts
Chapter Name : Acids Bases And Salts |
Sub Topic Code : 102_10_02_05_04 |
Topic Name : More About Salts |
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Sub Topic Name : Are The Crystals Of Salts Really Dry? |
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Introduction
Why copper sulphate crystals are blue? Why they loose the colour on heating?
Pre-Requisites:
Salts
Activity:
Plaster of Paris turns hard after adding water to it and leaving it for some time.
Real Life Question:
When we add water to plaster of paris what happens?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Water of crystallisation | fixed number of water molecules present in one formula unit of a salt |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Plaster of Paris | Add some water to it. See what happens after some time. Observe other changes. |
Real life uses :
Due to this water of crystallization only we are able to use Plaster of Paris in construction.
Places to visit :
Construction sites
Practical examples around us
| Examples | Explainations |
|---|---|
| Plaster of Paris | It contains water of crystallization |
What you learn in Theory:
Water of crystallization, salts which have it
What you learn in Practice:
How to remove and add back water of crystallization