1
You can detect the presence of starch using
iodine solution.
Reducing sugar can be detected with
Benedicts solution
What is an independent variable?
The variable you change in an experiment
e.g. (The surface area of the surface of diffusion)
To test for proteins we use _____
biurets reagent
This changes from ______ to _______
if starch is present
Brown , blue-black
blue, orange-red
How do I test for fats and oils?
Biurets reagent starts ____- and turns _____ when in contact with proteins
blue, violet
Cellulose molecules are also made of many glucose molecules linked in a chain
How are the different to starch?
Straight line vs spiral coil
The variable you measure in your experiment
e.g. (time in diffusion experiment)
The Ethanol Emulsion test involves dissolving _____
in _____ and then mixing it with ______.
If there are ____ in the ____ they form tiny _____ in the _____ which creates a _____ colour
fats, ethanol, water
fats, ethanol, droplets
water, milky white
To test for the presence of vitamin C we use
_______
It changes colour from ______ to ______ in the presence of vitamin C
DCPIP
purple, clear