Hydrogen Peroxide at high concentrations can be lethal. Catalase is there to help with the processes of breaking it down to assure that this doesn’t happen. The purpose of this lab was to help us understand what happens when an enzyme works with a substrate to make the reaction faster. It was to help show us what the effects of pH and temperature on the enzyme’s reaction. My hypothesis for the experiment was that the optimum temperature for catalase to function is 98.6o F because this is the optimum temperature for the human body.
The effectiveness of lipase on temperature Abstract Enzymes are biological catalyst that speeds up the rate of reaction. Different enzymes work best at different temperatures, which is also called an optimum temperature. Different enzymes also have different functions. Lipases are enzymes, needed to break down lipids (fats and oils) into the products - glycerol and fatty acids. They work best at room temperature around 36-40 C. Introduction For this experiment, I will be looking at how the change in temperature affects the rate of reaction.
The Solubility of Potassium Nitrate Introduction The purpose of this experiment was to observe how temperature affected the solubility of solid potassium nitrate that was put in different solvents. The temperature was not the other thing that was being varied to observe the solubility of potassium nitrate, the amount solute was also varied and the kinds of solvents in this experiment were varied. The nature of each solvent changes due to the common ion effect which is basically means that the concentration of a soluble salt is reduced if there is a common ion with that salt. Also potassium nitrate solubility in basic and acidic places was also determined, to see if it affected the temperature. The moles of KNO3 s/ Kg solvent were needed to calculate the correct molal concentration.
Then a small amount of the mixture was added to each of three melting point capillary tubes. Then one of the capillary tubes was put into the Mel-temp, so a fast run could be made to determine the melting point range. So, for the fast run the temperature was set at a high degree on the Mel-temp so the mixture could melt faster. Then we observe and record the initial temperature of when we begin to see signs of the mixture melting, and record the final temperature of when the solid mixture has turned into
The hypothalamus is the processing centre in the brain that controls body temperature. It does this by triggering changes to effectors, such as sweat glands and muscles controlling body hair. Heat stroke can happen when the body becomes too hot; and hypothermia when the body becomes too cold. Temperature control Temperature control is the process of keeping the body at a constant temperature of 37°C. Sweat is made up mostly of water but also contains minerals, urea, lactic acid, ammonia and sugar.
What would happen if our thermoregulation (temperature control) used a positive feedback to maintain homeostasis? Positive feedback occurs in the body in more bad ways than good. For example, when a baby is coming down the birth canal, the cervix dilates due to the release of oxytocin so the baby can come out, this is a “good” form of positive feedback. However, positive feedback can also be bad, for example, with Melanoma, a loop can form and promote more melanoma cells. With Negative feedback, the body would try to fight the bad cells to the best of its ability.
Favourable Reaction Conditions One can use Le Châtelier's principle to explain the most favourable reaction conditions for the production of nitrogen (II) oxide. By decreasing the pressure, temperature or by adding/removing different components of the reaction, one could manipulate the equilibrium creating the most favourable reaction conditions. By decreasing the pressure the equilibrium will shift by producing more molecules in order to increase the pressure of the reaction again. The equilibrium will move in such a way that the pressure increases again. Due to the fact that the ratio of the molecules is 9:10 in the reaction, by decreasing the pressure the position of equilibrium will move towards the right-hand side of the reaction.
Titration Practical Abstract The aim of this practical is to see how much Dilute Sulphuric Acid needs to be added to the Sodium Hydroxide to neutralise it. This is done by using a pink colour indicator (Phenolphthalein Indicator Solution) once the solution has turned clear this means that it has then been neutralised. I found that the solutions were made quite well as the reactions were completed quickly and within the range that was predicted. When performing the experiment I found that the equipment was very accurate making the measurements correct and increasing the reliability of the experiment. I predict that the lab technician’s Sodium Hydroxide will be a better solution than the one I made myself.
The solubility of solids in a solvent is very dependent on temperature. A solid tends to be more soluble in hot solvents than in cold. This is the reason the crystals precipitate out when the solution is cooled. There are no ideal solvents, however there are a few traits to look for when choosing the best solvent. Those that will dissolve the solute when the solution is hot but not cold.
Heat is transferred from one material to another through conduction. That happens when the water comes into contact with the cup itself. Materials that are good at conducting heat absorb the heat of the liquid quickly, and therefore, the liquid cools down. This happens when the heat energy is transferred from the water to the cup and then from the cup to the material around it. If the