2.7 Lab Tests for glucose and starch

2.7 describe the tests for glucose and starch

1. Glucose (C6 H12 O6) positive test 
a) Take glucose powder and dissolve it in a test tube 
b) Add  Benedict's Reagent (blue) 
c) Take test tube and place in a water bath to boil (60-70C) for 2-3 minutes
d) Remove test tube
Result = colour change from blue to orange.














2. Starch positive test 
a) In solid form = white powder
b) Place some white powder into a spotting tile 
c) Add Iodine Solution (brown)
Result = colour change from brown to dark blue/black colour