OC48 describe the general properties of the alkali metals and understand that alkali metals are in Group I of the Periodic Table and have similar properties
Group 1 metals in the periodic table are known as Alkali metals.
Examples,
Na, Sodium, K Potassium, Li Lithium,
Like all metals,
But they are also different,
Title
OC49 describe the reactions of the alkali metals with air and water
(word equations for reaction with water)
Apparatus
Method
Diagram
Safety Concerns
Wear goggles throughout this demonstration
Use gloves and tongs when handling the metals
Turn on air extraction systems
Results / Observations
Write a list of the metals tested in order of their reactivities
Did you notice any colours associated with any of the metals?
What effect did the metals have on the pH of the water?
Conclusions
The alkali metals all ____________________ with water,
the reactions get more __________ as we go down the group.
These reactions change water from neutral to _______________
Comments
Characteristic colour of ____________ is ______________
The chemical formula for this reaction is
Lithium + Water → Lithium Hydroxide + Hydrogen
The same reactions happen when we replace lithium with sodium or potassium, can you write the equations
Sodium is more reactive than Lithium
Potassium is more reactive than Sodium
When these metals React with water they release Hydrogen Gas and make the water Alkali or Basic.
To check out the reaction of all the Alkali Metals, watch this video
you can carry out these experiments virtually (on a computer)
What can you say about the reactivities of the metallic elements in group I, the alkali metals ???
OC50 understand that Group II elements are the alkaline earth metals