Today you will be a Forensic Chemist.
A bag of white powder has been confiscated by the airport customs. You need to find out what white powder it is?
Aim: To learn about the makeup of different white powders.
There are a number of different white powders in our everyday life. Some of these are harmful and others are not. Test the four white powders listed to see which one has been found at the airport.
You will be given a small amount of 4 white powders on your cardboard. On the black cardboard using a magnifying glass look at the powders.
Look at them under your magnifying glass and record what you see.
1. Cornflour
2. Baking Soda
3. Salt
4. Sugar
Before you add the iodine, vinegar or water you will need to divide each powder into 3.
1.
2.
3.
4.
5.
6.
7.
8.
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Steps
1.
2.
3.
4.
5.
6.
7
Words to use: Absorbed, spread, frothed, fizzed, melted, blob,
Sugar
|
Salt
|
Baking Soda
|
Cornflour
| |
Appearance
(White) | ||||
Grains
(small, medium large) | ||||
Smell
(Strong, none) | ||||
Iodine
| ||||
Water
| ||||
Vinegar
|
Write a conclusion about your findings. ( 4 plus sentences)
Use the Hexagon activity to give you some more ideas.
The sugar......
The salt.....
The Baking Soda......
The cornflour.....
Do all the same experiments on the mystery white powder. What is it?
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