White powder

WEDNESDAY, MAY 1, 2019

Hurumanu - What is that white powder?

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.

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

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.  Salt

2.  Baking soda
Cx3.  Sugar

4.  Cornflour

5.  Vinegar

6.   Water

7. Iodine 

Steps

1.  Folded paper in to four

2. Wrote on the paper 

3. we put the different materials on the paper 

4. put the vinegar in

5. 

6. 

Findings:

	Sugar	Salt	Baking Soda	Cornflour
Appearance	White	White	White	White
Texture	Small	Medium	Small	Small
Smell	No smell	No smell	No smell	No smell
Iodine	Change colour	Absorbs	Absorbs / Hardens	slides
Water	Wet	Absorbs	Absorbs / Hardens	Slides
Vinegar	Wet	Fizzes	Absorbs	Slides

Write a paragraph about your findings.

We fount out that if you put different types of liquid  it will change the texture of it. We found out that if you put iodine in baking soda it will harden. We found out that if you put iodine in some of these it will change colour and turn in to brown.The sugars appearance was white, It had no smell, and if you added iodine it will turn brown, If you add water it'll feel wet, If you also add vinegar it'll also feel wet. The salts temperance was white,the texture was medium,It had no smell to it,If you add iodine to it, It will absorb it,If you add water it will also absorb,but if you add vinegar it will fizz up.Baking sodas appearance was white, the texture was small,It didn't smell like anything if you add iodine to it it will harden, If you add water it will absorb and harden,and if you add vinegar it will only absorb it. The appearance of the cornflour was white, It didn't really smell like anything if you add any of the material it will only slide off.