Analysis of Ribena Using Titration

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Title: Analysis of Vitamin C in Ribena Using Titration
Aim:
The objectives of this experiment were to gain knowledge on how to titrate solution and determine amount of Vitamin C in Ribena. Results
Table 1: Mass of Ascorbic Acid in Volumetric Flask
Mass of empty bottle (g)21.5922
Mass of empty bottle with ascorbic acid (g)21.6954
Mass of empty bottle (g)21.5924
Mass of ascorbic acid used (g)0.1002
Number of moles: (mass of ascorbic acid used)/(molecular mass of ascorbic acid) = 0.1002g/(176.10gmol-1) = 5.69 x10-4 moles M1: concentration of stock ascorbic acidV1: volume in volumetric flask with stock solution M2: concentration of diluted ascorbic acidV2: volume in volumetric flask with diluted solution (M1 x 100)/1000 = 5.69 x10-4 molesM1: 5.69 x10-3 mol/L

M1V1 = M2V2
5.69 x10-3 mol/L x (10/1000) = M2 x (100/1000)M2: 5.69 x10-4 mol/L Table 2: Standardization of NBS
Titration numberRough 123
Final burette reading (ml)16.8027.0037.2047.30±0.10
Initial burette reading (ml)5.4016.8027.2037.20±0.10
Titre (ml)11.4010.8010.0010.10
Number of OK titres, N
Sum of OK titres 2.00
Average (ml)10.05
Calculation:
(10.00+10.10)/2 = 10.05
M1V1 = M2V2
M1: concentration of diluted ascorbic acidV1: volume of diluted solution in conical flask M2: concentration of NBS V2: volume needed for titration
5.69 x10-4 mol/L x (10/1000) = M2 x (10.05/1000)M2: 5.66 x 10-4 mol/L Table 3: Quantity of Vitamin C in Ribena
Titration numberRough12
Final burette reading (ml)12.2018.6025.00±0.00
Initial burette reading (ml)5.7012.2018.60±0.00
Titre (ml)6.506.406.40
Number of OK titres, N
Sum of OK titres2.00
Average (ml)6.40

Moles of NBS: MV
5.66 x 10-4 mol/L x (6.40/1000) = 3.62 x 10-6 moles
M1V1 = M2V2
M1: concentration of NBS solution V1: volume of NBS needed for titration M2: concentration of Vitamin C in ribenaV2: volume of ribena added 5.66 x 10-4 mol/L x (6.40/1000) = M2 x (2/1000) M2:...
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