Calculate amount of vitamin c in sample (mg) and concentration of vitamin c (mg/ml). Given: DCIP (0.1mg/ml water), Molar mass of DCIP= 268.1 g/mol Molar mass of ascorbic acid (vitamin c)= 176.12 g/mol
Calculate amount of vitamin c in sample (mg) and concentration of vitamin c (mg/ml). Given: DCIP (0.1mg/ml water), Molar mass of DCIP= 268.1 g/mol Molar mass of ascorbic acid (vitamin c)= 176.12 g/mol
Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Question
Calculate amount of vitamin c in sample (mg) and concentration of vitamin c (mg/ml).
Given: DCIP (0.1mg/ml water),
Molar mass of DCIP= 268.1 g/mol
Molar mass of ascorbic acid (vitamin c)= 176.12 g/mol

Transcribed Image Text:Titration
Heating
Volume of DCIP (ml)
Average
Amt of
Conc of
#
time
vol of
Vit C in
Vit C
DCIP
Sample
(mg)
(min)
(mg/ml)
Initial Final Difference
(ml)
la
26.30
34.60
8.3
7.45
0.15
0.03
1b
34.60
41.25
6.65
2a
5
26.0
31.50
5.5
5.375
2b
5
31.5
36.75
5.25
За
15
41.25
46.15
4.9
4.925
3b
15
15.8
20.75
4.95
4a
30
36.75
41.10
4.35
3.80
4b
30
41.10
44.35
3.25
Expert Solution

Step 1
Each cm3 of 1% DCIP solution equvalent to 6.071× 10^-4 g ascorbic Acid.
268.1gm DCIP=1Mol
0.1/1000=0.0001gm=(1/268.1)×0.0001mol =3.73×10-7M
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