So,we can deduce that the glucose concentration in the solution is lower than 5, For the unknown solution g,we can deduce that the glucose concentration in the solution is higher than 30% as the rate tot reduction is higher than the rate of reduction in of glucose concentration and we also can conclude that the glucose concentration in the solution is the highest as he rate of reduction is the highest, 6, When the unknown solution C is tested, there no change at all on the color of potassium permanganate. So,we can simply conclude that there is no even a little glucose in the solution. 7 _ Prom the standard curve plotted,we can estimate the real amount of glucose concentration in the unknown solution A, B and C based on the rate of reduction of potassium permanganate. Unknown solution I Rate of reduction (l/t)l Concentration of glucose (96) | A 0. 005461 -4 | B 0. 0576 160 1 Table 4 : The estimation of the concentration of glucose in the three unknown solution EVALUATION While conducting the experiment,there are a few limitations and weaknesses occurred that effects the result.
So,we must find the best solution to overcome those limitations so that we will get the better result and at the same time to ensure the vote hypothesis we made are valid and can be accepted few example of weaknesses that we can try to overcome are LIMITATIONS I SUGGESTIONS I The glucose solution has been oxidized by the surrounding oxygen as it has been left out for a quite long time and this will effect the concentration and also the rate of reduction Test the glucose solution as soon as it is prepared 50 that t will not be oxidized by the surrounding oxygen and we will get more precise result. The stopwatch is not started simultaneously as the potassium permanganate is injected into the solution caused the time taken for the potassium permanganate to discourses that is recorded is not precise. I The student who handled the stopwatch must be alert and always be ready to start the stopwatch as Soon as the potassium permanganate is injected into the solution so that the time recorded will be more precise.
I There sis time lag when the stopwatch stopped as the the potassium permanganate change to Lourdes caused the time that was recorded is not precise and it will effect the rate Of reduction. The student Who handled the the stopwatch must Stop the stopwatch as soon as the potassium permanganate turn to colorless in order for us to get the more precise time taken. I There are air bubbles trapped in the syringe when the solution is taken caused the volume of each solution used is not accurate and it effects the rate of reduction. We must rinsed the syringe first and ensure that there is no air bubble left before we taking another solution to ensure that the volume of every solution used in more accurate.
I The solution is not stirred properly caused the reaction is not going properly, I We must stir the solution property and constantly to ensure that all glucose is oxidized an the reaction is complete, The syringe is not rinsed first before another glucose solution is taken caused the concentration tot the glucose is affected. I Rinsed the syringe with distilled water first before another glucose solution is taken to ensure that the correct unaffected glucose concentration is used for the next test. CONCLUSION The estimation of the glucose concentration can be done by referring to the Standard Curve between the rate of reduction and the glucose concentration. Based on the estimation,we can deduce that the unknown solution A has the lowest glucose concentration and the rate of reduction is also the lowest. Meanwhile,among all of the solutions we can simplify that the unknown solution B has the highest glucose concentration and the highest rate Of reduction.
The relationship between the rate of reduction and the glucose concentration is a positive correlation as when the glucose concentration increased,the rate of reduction also increase. Besides,we can say that the relationship be,even he average time taken for the potassium permanganate to discourses and the glucose concentration IA a negative correlation as when the glucose concentration increased,the average time taken for the potassium permanganate will decreased. Based on the statement above,we can simply deduce that our hypothesis is accepted.