RP 4- food tests

Question 1

how do you test for carbohydrates (short chains ie. glucose) ?

Answer 1

benedict solution

Question 2

how does benedict solution work ?

Answer 2

blue -> brick orange

placed in a hot water bath

Question 3

how do you test for carbohydrates (long chains ie. starch) ?

Answer 3

iodine solution

Question 4

how does iodine solution work ?

Answer 4

orange -> blue black

just add solution

Question 5

how do you test for lipids ?

Answer 5

ethanol solution and distilled water

Question 6

how does ethanol work ?

Answer 6

colourless -> cloudy white

shake gently

Question 7

how do you test for proteins ?

Answer 7

biuret solution

Question 8

how does biuret solution work ?

Answer 8

light blue -> lilac purple

just add solution

Question 9

how do you set up the food test ?

Answer 9

1. use a mortar and pestle
2. add distilled water in beaker
3. filter out suspended food particles

Question 10

what are 3 things you could test for different chemicals ?

Answer 10

biscuit, cheese, apple

Question 11

what is a recommended amount of solution to test ?

Answer 11

2 cm^3