Stwff Flashcards
(5 cards)
1
Q
Glucose + Benedict’s test
A
brick red
2
Q
Sucrose + Benedict’s test
A
blue
3
Q
Glucose + iodine
A
Orange-brown
4
Q
Starch + iodine
A
Blue-black
5
Q
Test for protein
A
- add a few drops of sodium hydroxide and copper(ll) sulphate
- these react to make blue copper hydroxide.
- if a protein is present, the copper hydroxide interacts with the peptide bond in the protein to make buiret
- colour change from blue to purple
