Ap Chemistry Investigatory Project

It is amazing how there are world problems that can be solved in different ways. The scientific question for this investigation was, “Does the type of method or product affect how much water contamination was disinfected?” The hypothesis was, “If the type of method or product affects how much water contamination is disinfected, then the purification tablets will disinfect the water better.” The method or product was the independent variable while how well the contamination was disinfected was the dependant variable. The control variables were the amount of water (0.24 liters), amount of lemon juice (¼ teaspoon), and the original ph level of the water, which was 7.4. With the lemon juice added to the water, the ph level was 4.12. The method of boiling water was the control group and the purification tablets, bleach, filter, and distilment method were the experimental groups. Basically, the procedures of the investigation were to fill a cup with correct amount of water and lemon juice, use a product or do a method to the lemon water, then measure the …show more content…
Throughout the experiment, every experimental group had changed the ph level of the lemon water, although, some were more drastic than others. The boiling water method is more to kill bacteria rather than balancing the ph level, which explained why there was not a lot of change. The purification tablets seem to have the same problem. Bleach, however, was way better at getting rid of the acidity in the water. The filter that was used did a good job of purifying and was one of the better methods. Distilment was overall the best method for this experiment. Because distilled water is condensation, it was the cleanest out of the other four experimental groups. Purification tablets were not the best at disinfecting the water. Although there was more change than others, the relationship between the independant and dependant variable was