Hurumanu - What is that white powder?

Today you will be a Forensic Chemist. 

A bag of white powder has been confiscated by 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. 6

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.

Materials

1.  Magnifying glass
2.  sugar
3.  salt
4.  cornflower
5.  baking soda
6.   cardboard paper
7. pipette
8. iodine
9. water
10. Vinegar
Steps

1.  make four squares on your cardboard paper
2.   name each square...Sugar, cornflour, Salt and Baking soda
3.  then place a teaspoon of each ingredient in the correct square
4.  then separate the ingredients with a pencil but try to keep it in the square.
5.  get a pipette and put some water in it and put a very little bit of water in each square
6. then get the iodine and pour a little bit of iodine in each square as well and look at the colors

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)	medium	small	large	large
Smell (Strong, none)	none	strong	none	strong
Iodine	Changes color to brown	changes color to yellow	changes color to orange	changes color to black
Water	Turns darker	Turns darker	does not attach the baking soda does	does not attach to the cornflour.
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?
baking soda


Pictures of our work...