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.
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. Vinegar
2. Iodine
3. Water
4. Sugar
5. Baking soda
6. Salt
7. Baking powder
8. magnifying glass
9.Pipette
Steps
1. grab a piece of paper and split into four
3. Add the four different white powders
4. split powder into threes
5. add the different liquids
6.
7
Words to use: Absorbed, spread, frothed, fizzed, melted, blob,
Sugar
|
Salt
|
Baking Soda
|
Cornflour
| |
Appearance
(White) | white and sugery | White and salty | White | white |
Grains
(small, medium large) | medium | Medium | small | small |
Smell
(Strong, none) | none | none | none | none |
Iodine
| Absorbed | Absorbed | Absorbed | blob |
Water
| Absorbed | Absorbed | blob | blob |
Vinegar
| Absorbed | Absorbed | fizzed | blob |
Do all the same experiments on the mystery white powder. What is it?
The Mystery white powder is baking soda. The way me and my group found out the mystery white powder was by the way we looked at it with the magnifiner,
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