In the sodium iodide test, the alkyl halide is added to sodium iodide in acetone. In this test, primary halides precipitate the fastest while secondary halides need to be heated in order for a reaction to occur. Comparison of the rates of precipitation of the obtained product to standard 1° and 2° bromide solutions will show whether the product is a primary or secondary
Introduction The intent of this experiment is to understand how hot and cold water interact with each other by combining clear hot water and black ice cold water. I hope to learn more about how hot and cold water interact with each other. As of now, I know that cold water is denser than hot water. Knowing this I formed my hypothesis. Being, if hot and cold water were combined, then the cold water would move beneath the hot water because cold water is denser than hot water.
This happens because enzymes lower the activation energy, as they provide an alternative reaction pathway. The decrease in the energy level aids in making the process happen faster (Jae In Lee, 2011) A catalase is an enzyme, which is found in all living organisms. This enzyme helps to convert hydrogen peroxide into oxygen and water. Chemical actions that happen within the cell produces hydrogen peroxide, which is poisonous and therefore can kill the organism. As a result the presence of the enzyme catalase in the cell helps to quickly convert this toxic substrate into safer products of water and oxygen (All Science Fair Projects, 2004).
This ensures that only the compound with the lower boiling point is completely condensed before the compound with the higher boiling point begins to condense. Therefore, this means that the 2-propanol has condensed completely before 1-butanol had begun to, allowing the individual boiling points to be clearly analysed. As well the product can be pure 2-propanol if the temperature is decreased before the 1-butanol begins to condense. Compared to the simple distillation, it would be difficult to identify when the two compounds would be separated from the ever-increasing temperature. In addition, if one was intending to separate compounds with close boiling points, fractional distillation would better the better distillation
o Unknown sample (18) is yellow in color o First time attempting to dissolve, the solution looked like it fully dissolved but once it began to cool, it began to crystallize again boiled again o After adding the charcoal, solution started to turn a mint green color and after heating again the solution became very clear and light green color o Accidently got charcoal in flask when it was being filtered so we filtered it twice o 1st filtration had too much water, crystals did not form when placing flask in ice bath Discussion and Results: When determining the melting point of Benzoic Acid, we observed that the solid began melting at a temperature of 122.6 ºC. Due to this temperature reading we came the conclusion that apparatus #4 has a calibration error of approximately ±0.2 ºC. This error could be due to small impurity of the solid as well as technical malfunctions with the
In this condition the participant could enter into Hypothermia. Hypothermia is caused by exposure to low temperatures, the body starts losing heat more quickly than it can produce it resulting in the body temperature going down rapidly. The body can not replace the heat as it 's being lost to the environment, the severity depends on how low the body temperature drops. If the body drops below 35 degrees Celsius it is mild hypothermia, the body starts to shiver and vasoconstriction starts to reduce blood flow extremely. If the body then drops below 31 degrees Celsius it is Moderate hypothermia.
As much was conducted throughout this lab, the projected completion of this lab displays that ultimately, the higher the temperature of the water, the faster the dissolving rate of the Alka-Seltzer is. In other words, the hotter the water temperature the quicker the tablet dissolves within the water in regards to the amount of time it took to dissolve. Furthermore, this experiment helps to explain that, if water is taken at a higher temperature and Alka-Seltzer is placed within the water, the Alka-Seltzer will take less time to dissolve because the higher temperatures cause the tablet to melt at a quicker rate. This compares to when Alka-Seltzer is placed in colder temperatures, where instead it takes more time to dissolve, because the lower
The substitution reaction was successful but not fully effective. 19. If the data was inconclusive, then comparing various compounds and the unknown based on physical characteristics would be the first step, titrations would also be a good method. 20. To get a better yield, redoing the experiment would require careful attention in the recrystallization steps: amount of solvent used, how hot solvent is, if the mixture cools to room temperature before placing it in an ice
The purpose of this experiment was to find out if table salt, Epsom salt, kosher salt, or sea salt can be more affective in melting ice faster. After performing the experiment, my hypothesis that table salt would melt the ice cube faster than using kosher salt, sea salt, or Epsom salt was proven to be correct. The table salt took the least amount of time to melt the ice cube with an average of 24 minutes. Then came kosher salt with an average time of 31 minutes. Thirdly was the sea salt with an average of 33 minutes.
Higher temperature makes enzymes to denature and so changes its shape and makes it perform a different function. Extremely high temperature like boiling (100 degrees Celsius) decrease enzyme activity. Most enzymes work best at body temperature of 37 (degrees Celsius). PH is another factor that affect the rate of enzymes activity. Enzymes function slowly in lower pH like in the pH of 1 or 2.
When a medical team deliberately reduces the core body temperature of their patients, they are using a technique called induced hypothermia. A human’s healthy, body temperature will typically hover around 98.6 degrees fahrenheit; however, once hypothermia consumes the patient, their body will reduce to a temperature between 89.6 and 93.2 degrees fahrenheit. Today, there are technologies that will use cooling blankets or cooling catheters, which contain cold saline and are inserted into the femoral vein, to rapidly drop the patient’s body temperature. The ultimate goal of induced hypothermia is to prevent neural and cell damage in the brain after traumatic brain injured patients. Typically, the brain will not survive without oxygen for