White powder test

Aim : To determinate how different powders Look, Feel and react to other substances. 

Equipment :

Baking soda 

Sugar 

Salt 

Cornflour 

Iodine 

Vinegar 

magnifying glass 

Eye drop 

Black Card 

Tea spoon / Stick 

Method :

1. Place one-fourth teaspoon (1 ml) of the four white powders on a sheet of black construction paper. Label the powders with your pen.
2. Study the powders with the magnifying glass. Examine what each powder looks like. How would you describe the powder's shape. Does it have large or small grains? Your observations should be written in the appearance column of the chart.
3. Examine the powders further by rubbing each powder between your fingers. Describe how each powder feels in the Texture column of the chart.
4. Determine if there is a smell to any of the powders. Record your findings in the Smell column of the chart.
5. Take the eyedropper and place a drop of water on each individual powder. Examine what happens? Do the powders dissolve? Is there a reaction? Write your observations in the Reaction to Water column.
6. Place one-half teaspoon (2ml) of each powder in a separate jar. Add 2 drops of iodine to each jar using the eyedropper. Record what happens in the Reaction to Iodine column. Iodine should be handled with care.

When the powders we analysed they were found to have different properties. Powder D the largest granules. When Iodine was mixed with B it turned into black sticky goo.Some of the powders smelled a little.The powder that was smuggled into the country was powder A. 

Substance	Texture	Appearance	Smell	Iodine
A	Cornflower and Iodine made a oblick substance	This looked like black water but it wasn't.	Smelled like Iodine
B	Sugar made it feel like raro from a packet	It Look like  raro mixed with a little bit of water.	Smelled like Oranges
C	Salt made it go the black water with crumbs in it	It looked like water.	Smelled like flavoured water.
D	Baking soda Made it feel like baby food	Looked like Pumpkin baby food	No smell