White Powder

White Powder Test

Equipment:

Baking Soda
Cornflour
Sugar
Salt
Iodine
Vinegar
Magnifying glass
Eyedrop
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

A	Baking Soda- It turned a orange and yellow colour - kind of dissolved - Fine grains -
B	Cornflour- It turns to like oobleck - Has fine grains - Turned black straight away
C	Salt - Turned black - Big grains - Doesn't dissolve - Tunes orange when you put iodine and when mixes turns black
D	Sugar - Is orange when iodine is put on then turns black when mixes -  Big grains - Turned black - Doesn't  dissolve

 

When the powder was analysed they were found to have different properties. Powder D had the largest granules. When iodine was mixed with b it turned into black oobleck. None of the powders had a smell.