Glucose Concentation Experiment (Lab Report)

2184 Words Oct 11th, 2012 9 Pages
RESEARCH QUESTION
How does the glucose concentration effects the time taken for the potassium permanganate to decolourise from purple to colourless ?

HYPOTHESIS
The higher the glucose concentration the shorter the time taken for the potassium permanganate to decolourise from purple to colourless.

VARIABLES VARIABLE | UNITS | RANGE | METHOD FOR CONTROL | INDEPENDENT VARIABLE-Concentration of glucose solution | % | 5%10%15%20%25%30% | Different glucose concentration are tested | DEPENDENT VARIABLE-The time taken for the potassium permanganate to decolourise from purple to colourless | second (s) | - | Measure the time taken for the potassium permanganate solution to decolourise from purple to colourless by using stopwatch
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GRAPH 2 : Graph of rate of reduction of potassium permanganate against the concentration of glucose

The graph showed the relationship between the rate of reduction and the different glucose concentration.Based on the graph we can conclude that the relationship between the two things is the positive correlation as when the glucose concentration increased,the rate of reduction also increase.

STATISTICAL ANALYSIS The t-test The t-test is used when we want to decide whether there is significant different or not between two sets of data.In this case,based on the experiment,we are doing the t-test as we want to know whether there is a significant different or not between the different concentration of glucose and the time taken for the potassium permanganate to decolourise from purple to colourless.

Null hypothesis,H0
-There is no significant difference between the time taken for the potassium

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