Different white powders

Today for science we have been learning about all of the different white powders and what the do.

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.  Pipette
2.  Vinegar 
3.  Iodine
4.  Water
5.  Magnifine glass
6.  Paper

Steps

1. Fold cardboard into 4 
2. Put powders into 4 sections and into three bitz

3. Drop liquid into powders and record your findings
4. Use magnifine glass to see if it is big, medium or small
5. put down your recordings

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)	Big	Big	Medium	Small
Smell (Strong, none)	Didn't smell like anything	Didn't smell like anything	Didn't smell like anything	Didn't smell like anything
Iodine	Melts/spreads	Melts/spreads	Bubbles/Hard	doesn't melt
Water	Melts	spreads	spreads	melts
Vinegar	Melts	Melts	doesn't melts	Doesn't melts

Write a conclusion about your findings. ( 4 plus sentences)

The sugar melted and spreaded through the sugar
The salt melted and spreaded through the salt
The Baking Soda went bubbly then went hard also it spreaded
The cornflour melted and didn't smell like anything
I learnt that if you put Iodine on baking soda and fizzed up and then went hard
When I looked at the powder I could see that they were all in different sizes

Do all the same experiments on the mystery white powder. What is it?

It was Baking soda because I could tell it went hard and fizzed up like it did the first time