However, the concentration of amylase will be changed to have varying concentrations of 2.5%, 7.5% and 12.5% to determine the effect on the rate of starch breakdown. The starch solution will be changed from 5ml to 20ml as 5ml is a very small volume, thus to observe the colour and the effect of different concentrations in 20ml test tubes would be more efficient. As amylase concentrations are increased, the volume of starch is increased and the drops of iodine are increased in ratio. The dependent variable will measure the time taken for the starch to breakdown within 10 minutes to determine if there is an effect within the time limit. As background research from Professor Alicia states that the higher the concentration the faster the rate of starch breakdown, thus the lowest concentration is predicted to breakdown starch at a slow rate, or may have no reaction, thus the time limit will enable to test if it has no
However, the concentration of amylase will be changed to have varying concentrations of 2.5%, 7.5% and 12.5% to determine the effect on the rate of starch breakdown. The starch solution will be changed from 5ml to 20ml as 5ml is a very small volume, thus to observe the colour and the effect of different concentrations in 20ml test tubes would be more efficient. As amylase concentrations are increased, the volume of starch is increased and the drops of iodine are increased in ratio. The dependent variable will measure the time taken for the starch to breakdown within 10 minutes to determine if there is an effect within the time limit. As background research from Professor Alicia states that the higher the concentration the faster the rate of starch breakdown, thus the lowest concentration is predicted to breakdown starch at a slow rate, or may have no reaction, thus the time limit will enable to test if it has no