preview

Tap Water Hypothesis

Good Essays

Overall, the results mainly do support the original hypothesis. Throughout the 8 days of experiment, there was no lead, bacteria, or sodium detected by the test kits or the test strips that were used in any of the waters of the water bottle brands and tap water in both environments thus proving the hypothesis that was originally posed, correct. This was the same for the tap water from Quincy, Massachusetts in both environments, thus not supporting the original hypothesis of the belief of traces of lead or bacteria in the tap water of Quincy. However, the original pH estimates for the different types of water were not correct. The hypothesis about how pH balance would decrease in the cooler environment and increase in the warmer environment …show more content…

All of the types of water began with the same amount in both environments; 25 mL of water. Along with the pH changes, the estimates of the pH of each type of water was not correct for the most part. The hypothesis for the pH at room temperature was mainly incorrect. The hypothesis was that Fiji would have a neutral pH of 7, 7/11’s spring water would be slightly acidic, Quincy’s tap water would be slightly basic along with Poland Springs and Aquafina. The hypothesis was mostly proven wrong. Fiji’s water was slightly basic with a pH of 7.8, 7/11’s water was slightly acidic at a pH of 6.2, Quincy’s Tap Water was not slightly basic, but slightly acidic at a pH of 6.7. (Quincy’s tap water was the closest to the neutral pH of water that is 7.0) Poland Springs’ pH along with Aquafina was not basic, however they were both slightly acidic. Poland Spring’s pH was 6.5, and Aquafinia’s pH was 6.6. However, something that was observed and considered intriguing was how the amount of evaporation that occurred was not the same for each type of water, and it certainly was not the same in the different …show more content…

A color code was used to tell what the pH of the water was. For example, if the pH was 6, the pH test paper would turn into the color yellow, and if the pH was 7, the pH test paper would be a light green. Identifying the pH based on color could have slight human error as the pH could actually be 6.8, but when the pH of the water was tested, it could have been seen as a light green instead of a darker yellow green, thus the pH would be identified as 7 instead of the proper 6.8. Another issue that could’ve been caused from human error was that when measuring the amount of water by using a graduated cylinder, it could’ve been measured a slight bit off. Originally, the amount of water that was used for testing was 25mL. However, when measuring the amount of water, the water could’ve been 24.9 mL instead of 25mL due to the miniscus being formed and where the meniscus was believed to be. This would cause the amount of water being tested not the same for all the types of waters. Another issue that could’ve affected the result was that the refrigerator that held the test tubes that were in the cooler environment was frequently

Get Access