pH Level Essay

For this experiment, The scientists are testing the pH level of salt ( NaCl ) by putting water, measuring the pH, and then adding salt and checking the pH after. The scientist want to evaluate how acidic or how much of a base the salt is. The independent variable would be the salt. The dependent variable would be the pH level. The control would be the pH before salt is added. If the scientists add salt to pure water, then pH level of the water will drop turning the water acidic. In the experiment

different pH levels affect the population growth of yeast, which was based on the mm of carbon dioxide produced. Through this, our independent variable was the pH level of solution added to the test tube of yeast and sugar. Our dependent variable was the mm of CO2 produced, indicating population growth. For this lab, the proper control was a test tube with the yeast and sugar but no pH solution added. This was useful to compare our data to because it wasn’t being changed by the pH. Therefore

This experiment is being done to show the effect oh pH levels on daphnia by changing pH levels and measuring the hear rate. Introduction Daphnia magna are commonly used to test water toxicity, they are a vital part of fresh water ecosystems. They serve as a crucial role in food webs as they are a food source for smaller fish and invertebrates, and they also are a consumer of algae and bacteria (Elbert, 2005). They range from 2-5mm long these small crustaceans are also referred to as water fleas

The purpose of this investigation is to test the effect of differing pH levels on the heart rate of bivalve mollusks. Mollusca can be classified by their soft bodies, “head” and “foot” regions. They also generally have hard exoskeletons that cover their bodies. This is the case with snails and, of course, clams. Bivalve mollusks have a hard outer shell and soft insides. Their hearts are located towards the center of the umbo, which extends from the terminal end of the valve. The umbo is also the

What effect do acids and bases of varying PH levels have on the efficiency of catalase? Catalysts are an extremely important part of the experiment, but to understand catalyst you first must understand Activation energy. Activation Energy is “the minimum amount of energy that is required to activate atoms or molecules to a condition in which they can undergo chemical transformation or physical transport.” (Encyclopedia Britannica, "activation energy | chemistry"). A Catalyst is “is a substance

at varying pH levels and temperatures. Purpose: The chemical hydrogen peroxide(H₂O₂) is broken down by the enzyme catalase. Hydrogen peroxide is a byproduct formed in cellular reactions that, if not broken down, could inflict severe damage to the cell. Catalase is an enzyme that breaks down hydrogen peroxide in to water and oxygen. How efficient and strong the enzymes reaction to break down H₂O₂ determines largely on temperature and pH level. An enzyme only functions within a set pH and temperature

the relationship between enzymatic reaction affected by temperature and pH. Through the testing the enzyme at different temperatures, and different pH levels; it would determine at which temperature and pH level the enzyme worked the most efficiently. Analyzing absorbance of the solutions with spectrophotometery will determine the reaction rate. To test the optimal pH, the starch and a buffer were combined at a specific pH level and tested the absorbance of a solution at various times. To resolve the

The pH level of water that is being given to a plant is very important to a plant's growth and nutrition. Although most plant do best in a pH of 6.0-7.0, they may still grown in higher and lower pHs.(sf gate). In extreme pH levels nutrient levels and the concentration of harmful minerals can be affected. (sf gate). In basic soil nutrients such as zinc and copper become unavailable, while in acidic soil some macronutrients, such as calcium and magnesium, are not absorbed while others reach toxic

How Does Dilution Affect pH Levels of Acids and Bases? Introduction: In this activity you will investigate the effect adding water will have on various solutions pH levels. The pH scale is used to measure the degree of acidity or basicity of a solution. The pH scale runs from 0 (very acidic) to 14 (very basic), while a neutral liquid such as water has a pH of 7. The pH level is linked to the concentration of hydrogen ions found in the solution. Before you start -. Before beginning this activity

pH levels effect on Enzyme Activity and Concentration Abstract: pH level may affect enzyme activity and the performance of the enzyme which is crucial in order for the enzyme to properly function in our biological systems. We investigated the relationship between pH level and rate of enzyme function at that certain pH level. The enzyme concentration was recorded at varying levels of pH using the enzyme Lactase, substrate ONPG, and phosphate buffer in a spectrophotometer set at wavelength 405nm. As