Food Tests Flashcards
how to test for starch?
iodine
how to test for protein?
biuret solution
how to test for co²?
lime water
how to test for water?
cobalt chloride paper or anhydrous copper sulfate.
how to test for fat?
brown paper
how to test for reducing sugars?
Benedicts solution and heat
what is biuret solution made of?
sodium hydroxide and copper sulfate
how does iodine change when starch is added?
the iodine changes from
red/orange -> blue/black
how does biuret solution change when protein is added
it changes from
highliter blue -> violet
how does brown paper change when fat is rubbed on it?
the brown paper turns transparent
how does Benedicts solution change when heat and reducing sugars are added?
it turns from blue -> brick red
how does lime water change when co² is added?
it turns milky
how does cobalt chloride paper change when water is added?
it turns from blue -> pink
how does anhydrous copper sulfate change when water is added?
it will turn from white -> blue
what is anhydrous copper sulfate?
its dried out copper sulfate
