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.

Here are some examples of everyday kitchen white powders.

Flour

Cornflour

Sugar

Salt

Baking Soda

Baking Powder

Icing Sugar

Tartaric Acid

Citric Acid

Gluten Free flour

Materials

1.  

2.  

3.  

4.  

5.  

6.   

7.

Upload a photo of each powder.

1.  Cornflour

2.  Baking Soda

3.  Salt

4. Sugar

On the black cardboard using a microscope you need to record what you see. You will be given a small amount of 4 white powders on your cardboard. Look at them under your microscope and record what you see.

Do not mix the powders or taste the powders.

Findings:

	Sugar	Salt	Baking Soda	Cornflour
Appearance	white	white	white	white
Texture	crystal	Crystal	Square powdery crystals	powder
Smell	Sweat lollie	disgusting	sodium	corn
Iodine	Changed colour to dark orange	dissolved	hardened	Turned black
Water	Got wet No change	No change	hardened	Made oobleck That is a hard gooey liquid
Vinegar	Got Wet No change	No change	foaming	No change

Write a paragraph about your findings.

when we added the chemical water to sugar and salt nothing happened. 

when we added iodine to sugar and cornflower it changed colour.

when we added vinegar to baking soda it fizzed up.

Making Sherbet

Using the following recipe you need to make sherbet.

Sherbet recipe

Recipe:

1tsp of powdered drink crystals (eg refresh)

1/4 tsp citric acid

1/4 tsp tartaric acid

1/4 tsp -baking soda.

Put all ingredients into a zip lock bag, stir, and enjoy.

Materials:

Findings:

Sherbet
Taste
Colour