Vitamin C practical Flashcards
1
Q
IV
A
juice used- grapefruit orange
2
Q
DV
A
vitamin C concentration
3
Q
how do you vary IV
A
diff juices 5 different
4
Q
how do you measure the DV
A
use a titration
dropwise add juice into DCPIP until reduced from blue to colourless
repeat at least 5 times and use a calibration curve to find exact concentration for each juice
5
Q
control variable- organisms
A
age
type of juice
6
Q
control variable- environmental
A
storage
7
Q
control variable- procedural
A
volume of DCPIP- graduated pipette
Concentration of DCPIP
8
Q
repeats
A
at least 5 for each juice- until concordant results are found
remove and identify anomalies
calculate a mean
calibration curve
