Core 2: Vit C

Question 1

Outline method

Answer 1

1. 6 different known concs of Vit C
2. Measure set vol (and set conc) of DCPIP In to test tube
3. Add solution with burette drop by drop and shake gently
4. Record volume of solution when colourless
5. Plot a curve of beat fit to use as calibration curve

Question 2

IV

Answer 2

Vit C concentration

Question 3

DV

Answer 3

DV: volume of solution (or juice) to turn DCPIP colourless

Question 4

Control variables

Answer 4

1. Temp

2. Conc of DCPIP