non reducing sugar

Question 1

What chemicals are used

Answer 1

Dilute hydrochloric acid
sodium hydrogencarbonate

Question 2

what test is important to do before this test

Answer 2

Conduct a reducing sugar test to check they are not present

Question 3

What are the steps

Answer 3

-test for reducing sugars
-take sample add HCl- and heat in water bath
-cool solution
- neutralise with sodium hydrogencarbonate
-Test for reducing sugars again

Question 4

what colour precipitate will show for a positive result

Answer 4

green
yellow
orange
red

(depends on conc)

Question 5

After boiling the sample with HCL, you leave it to cool and neutralise with sodium hydrogencarbonate. What piece of equipment can be used to indicate wether the solution has been neutralised

Answer 5

Litmus paper to determine the pH

Question 6

after neutralised with sodium hydrogencarbonate, you must add a little more sodium hydrogen carbonate. Why?

Answer 6

conditions need to be a little alkaline for the test to work

Question 7

how many times do you have to do the reducing test to test for non- reducing sugar

Answer 7

2