Determining the glucose concentration in Sprite

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Name: Raj Bose
Date: 23/1/2015
Partners: Sunniva & Bayu
Determining the concentration of glucose of 7UP
Glucose solutions prepared as follows:-
In each case 250.0 cm3 volumetric flasks used
Concentration (%)
Mass/g
4.00
10.00
8.00
20.00
12.0
30.00
16.0
40.00
20.0
50.00

Table: 1- Recording of concentration, volume, and qualitative observations of various solute/solvent/solution used during the experiment.
Name
Concentration (%)
Volume (ml)
Qualitative Observations
Glucose (C6H12O6)
5 different types:
4%,8%,12%,16%,20%
5.0 ± 0.1 ml
Clear, Colourless

Name
Concentration (M)
Volume (ml)
Qualitative Observations
Potassium Permanganate (KMnO4)
0.010 M
1.00 ± 0.05 ml
Intensely pink/purple
Sulphuric Acid (H2SO4)
1 M
5.0 ± 0.1 ml
Clear, Colourless

Data Collection:-
Table: 2- Shows the concentration of glucose solution (%) and the total time taken (s) by the solution to decolorize

Glucose Solution (%)
Time (± 1 s)
Trial 1 (Me)
Time (± 1 s)
Trial 2 (Sunniva)
Time (± 1 s)
Trial 3 (Bayu)
4%
189
195
196
8%
129
211
135
12%
143
148
146
16%
160
175
162
20%
231
226
218
7UP
99
93
95

Data Processing:-
Table: 3- Shows the concentration of glucose solution (%) and the time after subtracting the lap time (s) took by the glucose solution to decolorize. Also the average for all three trials are calculated and shown below.
Glucose Solution (%)
Time (± 1 s)
Trial 1 (Me)
Time (± 1 s)
Trial 2 (Sunniva)
Time (± 1 s)
Trial 3 (Bayu)
Average
4%
189
195
196
=(189+195+196)/3
=193
8%
99
181
105
=(99+181+105)/3
=128
12%
83
88
86
=(83+88+86)/3
=86
16%
70
85
72
=(70+85+72)/3
=76
20%
111
106
98
=(111+106+98)/3
=105
7UP
99
93
95
=(99+93+95)/3
=96

The following lap times were subtracted from respective Glucose Solution (%)
For 8%- 30 second was subtracted
For 12%- 60 second was subtracted
For 16%- 90 second was subtracted
For 20%- 120 second was subtracted

Since we used a single stopwatch we had to subtract the lap times as explained above.
Graph 1: Average Time VS Concentration



Cited: http://www.7up.com/text/product/7up/nutritional-info/

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