Extended Essay RC2

After a few months of work on my EE, I finally achieved a point in the research where my method was stable. This was done through a lot of decision making in order to fine-tune the process and ensure that the experiment would move smoothly. The pH values chosen were done so due to the knowledge from research papers. Since the coagulants only change behavior above and below the pH of 6, the pH values of 7 and 5 were chosen in order for enough to talk about as well as a more direct comparison. Concentration was also thought about extensively due to there being a chance that using a concentration that is too high would overdose the coagulation. Stirring by hand was also a sacrifice I had to make in order for my experiment to be completed quickly. A colorimeter was also chosen over the measuring cylinder for lower uncertainty.

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