1 Title

Question 1

1 Title

Answer 1

Mass of vit C

Question 2

2 Aim

Answer 2

to determine which out of three juices has the greatest concentration of vit C

Question 3

UC 1

Answer 3

Vit C (Asorbic acid) reacts with iodine in the following redox reaction
C6H8O6 + I2 = C6H6O6 + 2H+ + 2I-

Question 4

UC 2

Answer 4

a redox reaction is a reaction where oxidation (loss of e) and reduction (gain of e) happen at the same time

Question 5

UC 3

Answer 5

reduction = I2 + 2e- = 2I-

Question 6

UC 4

Answer 6

Full structure (on sheet)

Question 7

UC 5

Answer 7

its clear from this format that where VIT c undergoes oxidation as well as e- being lost H is lost this can be expressed in an O-H ratio.
C6H8O6 = C6H6O6
3:4 1:1

Question 8

UC 6

Answer 8

describe titration (end point is blue black)

Question 9

method

Answer 9

Make a standard solution for each of the three juices titrate against iodine with a starch indicator record results and calculate mass of vit c no additional safety precautions needed