Reviewing my data table and graph results it is clear to see that as the substrate concentration increases so does the rate of reaction. The catalysing of enzymes involves molecular movement of the substrate and enzymes in an aqueous solution. Therefore the substrate and enzymes are moving randomly within the solution (Brownian motion). By increasing the concentration of the substrate particles the rate of reaction is increased as the substrate is much more likely to find an active site. This results in more reactions occurring which then produces more product (oxygen) which causes the filter paper disks to rise to the surface of the solution at an accelerated rate. This increase in the reaction speed can be viewed by calculating the percentage
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However the percentage of increases from sixty to eighty is ninety percent and from eighty to one hundred percent concentration is one hundred and sixty three percent. This shows an exponential percentage increase in product production by increasing the substrate concentration. Although not viewed in the practical if further concentrations of substrate were introduced to this experiment it would be expected that the rate of reaction would level off. This levelling off point is known as the point of saturation. Which means that the amount of substrate in the solution now exceeds the number of active sites available for the substrate. This is because the maximum number of reactions are being done instantaneously so any extra substrate has to wait until an active site become available. Reviewing the reaction rate graph it can be noted that for one hundred percent concentration the error bar is indicating a large amount of variability compared to the error bars of other concentrations. These results could be accounted for with regard to physical or human error during the practical examination, for example measuring reaction time to the closest 0.01 of a second rather than 0.1, the disk sticking to the base and the thin girth of the tube hampering disk
However the percentage of increases from sixty to eighty is ninety percent and from eighty to one hundred percent concentration is one hundred and sixty three percent. This shows an exponential percentage increase in product production by increasing the substrate concentration. Although not viewed in the practical if further concentrations of substrate were introduced to this experiment it would be expected that the rate of reaction would level off. This levelling off point is known as the point of saturation. Which means that the amount of substrate in the solution now exceeds the number of active sites available for the substrate. This is because the maximum number of reactions are being done instantaneously so any extra substrate has to wait until an active site become available. Reviewing the reaction rate graph it can be noted that for one hundred percent concentration the error bar is indicating a large amount of variability compared to the error bars of other concentrations. These results could be accounted for with regard to physical or human error during the practical examination, for example measuring reaction time to the closest 0.01 of a second rather than 0.1, the disk sticking to the base and the thin girth of the tube hampering disk