How Are Organisms Able For Survive And Function With Proficiency Despite Metabolic Activities?

In this lab, the purpose was to determine the stability of a substance after adding an acid or a base. The results claim that liver and buffer are the most resistance to change in pH. Looking at figure 3, buffer and liver both maintain a stable pH even with the addition of an acid or base. However, potato and water have less buffer in them since their pHs did change. In figure 3, the potato acid’s pH level decreased by two, and the potato base’s pH level increased by two. The level of pH of a water acid decreased by 4, while the water base’s pH increased by 5. These results all tie to the fact that buffer is a substance that maintains a stable pH; the presence of buffer in organisms help maintain homeostasis by binding or releasing hydrogen

An acid is a compound that donates hydrogen ions when dissolved in water. A base is a compound that releases hydrogen ions when dissolved in water. When an acid and base are mixed together, they neutralize each other, forming a salt and water.

Purpose/Hypothesis: The purpose of this experiment is to use both cabbage juice and pH paper to determine the pH of household items. This way, we can tell which products are basic and which one are acidic. If we use cabbage juice as an universal pH indicator by comparing it to pH paper then pH determined by the cabbage juice will be unstable because by using cabbage juice, it can be different depending on how diluted it is.

Controls- The control in this experiment was very important because if it was not contained, then the data would have been faulty. It was very difficult to keep

To start out this study the difference between acids and bases has to be identified. Acids have very low pHs and have a high concentration of hydronium ions, while bases have a high pH and have a high concentration of hydroxide ions. The difference between strong bases and acids, and weak bases and acids is the amount of dissociation. Strong bases and acids dissociate a large amount and let go of their ions in solution, while weak bases and acids may only let go of some of their ions. This is important because if the unknown solutions aren’t strong acids or bases then using their ions to calculate the pH of the solutions will give false results (Diffen 2012).

There were three test tubes in which the experiment was held. A relatively equal sized portion of raw potato (this contained the enzyme [a biological catalyst] hydrogen peroxidase) was placed in each tube. Then, enough water to cover the potato was added. Proceeding this, each of the test tubes were assigned a temperature; cold, room temperature or warm (this was written on the tag so that they were not confused). The test tube destinated ‘cold’ was placed in a ice bath for five minutes. At the same time, the ‘hot’ test tube was placed in a hot water bath for five minutes. Meanwhile, the room temperature test tube sat at room temperature for five minutes. When the five minutes were over, the test tubes were returned to the rack (so that they were able to be observed). Then, the test tubes were allowed to sit at room temperature for five more minutes. Once that period of time was over, 2 ml of hydrogen peroxide (the substrate) was added to each tube.

Bases are a substance with a pH higher than 7, and have a high concentration of hydroxyl ions. Bases can react with acids in order to neutralise them in order to form salt and water. Bases are normally metal oxides or metal hydroxides. Sodium hydroxide for example is a base.

In this gummy bear lab, the goal was to see the movement of water in cells depending on the concentration of solutes in the environment. The control group was the type of water used. The research question for this experiment was, how does concentration of solute in the environment affect water movement in cells? The hypothesis thought of for this question was that the salt water would enlarge the gummy bear the most. The distilled water would not enlarge the gummy bear as much as the salt water.

solution is acidic. When it is green to yellow, it indicates that a solution is basic. When it is purple to blue, it indicates a solution is neutral. Would you characterize vinegar and ammonia as acids or bases? Explain.

Hydrochloric acid is a strong acid whose pH is value is very close to 1. There is a measurement scale for the strength of acids which is called a pH scale, as the pH value gets closer to 1, it means the acid gets stronger. (pHScale, 2017) The chemical formula

We had to get exactly 25ml of water from the creek, and calculate the PPM of dissolved oxygen in it using a test kit. So, we went down to the creek, got exactly 25ml of water, and then we brought it back. We had to break a dropper in it and watch the colour of the water. We found that the colour matched 12 PPM on the scale; a deep blue. We collaborated with the other groups, and wrote down the other groups’ results to compare. We calculated that the average pH for the creek water was 7; entirely normal. We did some other stuff, like finding the number of rocks that neutralized acid in the creek, and vice

Therefore, they discussed how in the future, there could be some adjustments for the experiment. Although the data did support the hypothesis, the experiment may have worked better if the experimenters had enough background knowledge on the regular salt concentration, usually in the potato itself. Not only this, but if they had multiple types of potatoes, there would be a lot of data, but this could also help the it be narrowed down and specified, especially since there are so many examples involved. As mentioned, one thing that helped the experiment were the factors that were controlled, such as the beaker with 0% salinity. It helped the experimenters compare the other tests to some sort of a

This lab was to see chemical reactions with different liquids. This was important to find the unknown substance. The controlled variable was the unknown powder, since it doesn’t change. The independent variable was the liquids. These liquids were vinegar, iodine, and water. Lastly, the dependent variable is the chemical reactions. The reaction was affected by the different liquids. If the liquids are changed then the chemical reactions will be different, because they have different properties, causing the atoms to bond differently.

The purpose of this experiment was to test the effects that temperature, pH, and substrate

The experiment that the class worked on was about peroxidase. Peroxidase is part of the enzyme group that presents most living organisms (Ahmed, 2013). Peroxidase interferes with the removal of hydrogen peroxide (Ahmed, 2013). Hydrogen peroxide is a toxic product that have normal metabolism before it causes any cell damages (Ahmed, 2013). Peroxidase has two substrate and both of them must present a reaction (Ahmed, 2013). One of the two substrate is H2O2 and other one just depends on the organism or the cell type (Ahmed, 2013). The substrate that the class uses is turnip extract. In the class there were five experiments to do but the class were assigned into groups and each group were going to do two experiment. The names of the experiments are: Baseline, Temperature, and pH.