Forensic chemist

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. 

These are the four powders we will be using. Upload a photo of each powder. 

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.

Findings:

Words to use: Absorbed, spread, frothed, fizzed, melted, blob,

	Sugar	Salt	Baking Soda	Cornflour
Appearance (White)	white	white	white	white
Grains (small, medium large)	small	large	small	very fine/medium
Smell (Strong, none)	strong	strong	strong/really bad	strong like vinegar
Iodine	brown	yellow	brown & black	light brown
Water	wet	nothing happened	turned into lumps	went blue
Vinegar	grey/wet	nothing happened	fizzed	lump

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.....

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