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Quantifying the Amount of Glucose in a Potato
BerylliumJOSE, Williard
DAROYA, RangelUTANES, KerwinELATICO, Adam
TANCHULING, DiegoMAGNO, Gian
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IntorductionThere are a lot of ways to determine the
glucose concentration of a solution…These include the use of special
indicators, titration, or osmosisBut for this particular experiment, a
different protocol has been used.
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HOW DID WE DO IT??!! :O :O :O
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Preparation of Solutions100mL of 1 M of sulfuric acid125 mL of 0.0025316 M of Potassium
permanganateGlucose solution (1%, 2%, 4%, 8%)Potato Solution (approximately 0.5 g of crushed
potato in 50mL of water)
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Preparation of Solutions
Fig 1. Adding sulfuric acid in distilled water.
Fig 2. Stirred potassium permanganate in distilled water.
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Preparation of Solutions
Fig 3. Weighing of solid glucose to be used in solutions
Fig 4. Adding distilled water to solid glucose.
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Preparation of Solutions
Fig 5. Weighing of potato slices. Fig 6. Three of approximately 0.5 grams of potato slices.
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Preparation of Solutions
Fig 7. Crushing 0.5 grams of potato slice using mortar and pestle.
Fig 8. Placing crushed potato in Erlenmeyer flask.
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Preparation of Solutions
Fig 9. Adding distilled water to crushed potato.
Fig 10. Three potato solutions, four glucose solutions, and a potassium permanganate solution
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Glucose and Potato SolutionsFive milliliters of sulfric acid was added using
syringeAfter adding sulfuric acid, two milliliters of
potassium permanganate was added (syringe)Time was recorded right after potassium
permanganate was added until color disappears from solution
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Adding Sulfuric Acid
Fig 11. Adding sulfuric acid to glucose solution.
Fig 12. Adding sulfuric acid to potato solution.
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Adding Potassium Permanganate
Fig 13. Adding potassium permanganate in glucose solution while timing.
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RESULTS!!!!
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Results
The following slide shows the reaction times taken by the solutions:
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ResultsSource Weight
(g)Theoretical % Glucose
Time (s)
1/Time (1/s)
Experimental % Glucose*
C6H12O6 1 0.9901 251.8 3.971E-3 0.3629
C6H12O6 2 1.9608 110.0 9.091E-3 2.5808
C6H12O6 4 3.8462 74.64 1.340E-2 4.4464
C6H12O6 8 7.4074 53.01 1.886E-2 6.8145
Potato 0.5 N/A 27.40 3.650E-2 14.452
Potato 0.5 N/A 29.05 3.442E-2 13.555
Potato 0.5 N/A 26.07 3.836E-2 15.259
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Discussion
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Sources