P HLab Exerciseand Evidence PDF

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pH of Common Materials – Lab Report Assistant Questions: A) Compare and contrast the results between the commercial and homemade pH test strips. Which test strips were more accurate? Explain your answer. Looking at the outcomes provided by both the commercial and homemade pH strips, it becomes obvious that the homemade pH scale was not very accurate. For example, I thought the commercial strips were more reliable in the experiment when testing the products. Data Table 5 would show, for example, when checking the soy sauce, that the commercial pH strip confirmed it at a pH level of 6.0, which can be considered neutral. However, the home-made strips categorized it as a base with a pH level of 12. Also, considering that the commercial strips were made with expertise and experience, I personally believe they will give more accurate results compared to pH strips made my me. Taking all this into consideration, I believe the commercial strips are accurate. B) Why is the pH scale important in science? Give several examples of scientific applications. In science, the pH scale is important because it is used to quantify a solution's acidity which is essential for the maintenance of life. For example, the pH scale will set the pH level of the soil in the case of planting and decide whether or not a plant can grow and prosper. Another case concerns how the acidity in our body can be measured by a pH scale. Too much acidity could lead to improper functioning of our organs and/or death, so keeping our blood pH level neutral is salient for human life. Lastly, it helps us in knowing the level of acidity in water and rainfall. If acid rain occurs it affects the pH of nearby bodies of waters and thus makes it harder for certain aquatic life to survive. C) What information about a chemical solution can be inferred from knowing its pH value? Knowing a pH value of a chemical tells us the number of hydrogen ions is in a solution. In addition, it’s evident that acids are going to react with bases and bases are going to react with acids. We can then assume the stability of the chemical solution by understanding the concentration of the acid / base. We know that the solution is highly corrosive, and has a sour taste if the chemical solution has a pH balance of 1. We also understand that the solution is toxic, and tastes bitter if the chemical solution has a pH balance of 12. D) If a chemical has a pH of 3, how could you alter its pH value to be more basic? In order to change the chemicals pH value to become more basic, you could just add more water to dilute the acid.

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