the Benedict's test

Question 1

what does the Benedict’s test test for?

Answer 1

reducing and non reducing sugars

Question 2

what if the results negative of the first Benedict’s test?

Answer 2

there may be a non reducing sugar present so the test needs to be repeated

Question 3

How do you test for a non reducing sugar?

Answer 3

1. get a new sample of the thing your testing
2. add hydrochloric acid to break the bonds
3. place in water bath for 5 mins
4. slowly add sodium hydrocarbonate solution to neutralise
5. Retest using BS and if there’s a colour change, NRS is present
6. If there isn’t, there’s no reducing or non reducing sugar present

Question 4

what colour is Benedict’s solution?

Answer 4

blue

Question 5

How do you test for a reducing sugar?

Answer 5

1.add benedicts reagent
2. heat in a water bath
3. if a brick red precipitate forms, a reducing sugar is present