Chemical test

Question 1

What must we do to a colorimiter before we take our first measurement?

Answer 1

• place a filter into the colorimeter
• calibrate with distilled water

Question 2

What must we do to the solution before testing it with a colorimeter?

Answer 2

Filter out the precipitate

Question 3

What is another way to test the concentration of a sugar?

Answer 3

Reagent strips - the different colour that the strip will turn indicates the concentration of sugar.

Question 4

How do you test for non reducing sugars?

Answer 4

Boil sugar solution with HCl acid first. Then neutralise with alkali like NaCO3

Question 5

what are the three components in biosensors?

Answer 5

• The molecule recognition componant (like a protien or a single strand of DNA)
• Transducer, which detects a change and causes a response (like the release on an immobalised dye or an electric current).
• display (produces a visible, qualitative, or quantitative signal)

Question 6

What temperature should benedicts be heated to in the test for sugars?

Answer 6

Above 70°c

Question 7

How to find solution of sugar without colorimeter?

Answer 7

compare colour of benedicts solution to standard solutions.

Question 8

distance travelled by componant ÷ distance travelled by Solvent

Answer 8

retention value