Hurumanu The white powder experiment.

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.

Materials

1.  card board
2.  Iodine
3. vinegar 
4.  pipette
5.  water
6.  baking soda
7.  salt 
8.  sugar
9.cornflour.


Steps

1. Fold the card board into four.
2. Then put a tea spoon of baking soda,salt,sugar and cornflour onto each square of  your cardboard.
3. Then divide the powders into three.
4. Then put three drops of ,Iodine,vinegar and water into each powder. 
5. Then watch what happens. 

Findings:

	Sugar	Salt	Baking Soda	Cornflour
Appearance	white	white	white	white
Texture	Large	Large	Medium	Small
Smell	Doesn't smell like anything.	Doesn't smell like anything.	Doesn't smell like anything.	doesn't smell like anything.
Iodine	The iodine melts into the sugar and gives it a golden colour.	The iodine melts into the salt and gives it a golden colour.	The iodine rolled off the baking soda.	The iodine melted in.
Water	The water melted in.	the water melted in.	The water rolled off.	The water melted in then it went hard.
Vinegar	The vinegar melted into the sugar.	The vinegar melts into the salt.	The baking soda fizzed when i dropped the vinegar onto the baking soda	The vinegar just stayed on the top of the cornflour then it went dry.

Write a conclusion about your findings. ( 4 plus sentences)
The sugar,salt,baking soda and the cornflour was white the texture of the sugar and salt was large but the baking soda was medium and the cornflour texture was small.  None of the powders had a smell.  The iodine melted into the sugar and salt and gave it a golden colour.  The iodine rolled off the baking soda.  Then the iodine melted into the cornflour.  The water melted into the sugar and the salt. But the water rolled off the baking soda.  Then the water melted into the cornflour then the water went dry.  The vinegar melted-into the salt.  Then the vinegar made the baking soda fizz.  The vinegar just stayed on the top of the cornflour.