Quantum chemistry

Today in class we used GloGerm to see how well we wash our hands. Since school just started many people are getting sick including me. Washing our hands is a very important during the flu season and every day. Illnesses are spread when particles from a cough or sneeze gets in the mouth or nose of a nearby person. This includes doorknobs, desks, tables, phones, pencils, basically anything you touch and someone else touches. It is key to not touch your eyes, mouth, or nose especially during the…

From the results, it is valid to conclude that the reaction with the fastest reaction rate is magnesium and hydrochloric acid. Initially, it was hypothesized that the reaction with hydrochloric acid would have the fastest reaction rate due to its high acidity observed from the pH scale. From there, the following reactions were based on the pH of the acid involved as well as the concentration of hydrogen ions/atoms within the acid molecule. As a result, it was hypothesized that the sulfuric acid…

How to change a cartridge Shower Delta ? The valve cartridge in the Delta Faucet regulates the temperature and controls the flow of water coming into the faucet through a line of hot and cold water. Water temperatures inconsistent, a leaky faucet and the loss of water flow to the shower, all the problems are caused by a cartridge valve for damage and wear. The shower handle is fixed to the front end of the valve cartridge. To remove the valve cartridge, the handle and the rest of the tap is…

When I first downloaded the outline to lecture two and saw the tittle “Biological Bases of Behavior” I thought “okay he’s just going to go over all the parts of the brain and tell us a little bit of what the parts do.” The amazing things is that it wasn’t like that at all, I learned so many new and interesting things. One thing that really stood out to me was when he started talking about sensory information and motor information. I thought it was so cool how all the sensory and motor…

2. Experimental 2.1. Materials and reagents Analytical grade bentazon was purchased from Sigma-Aldrich. Acetonitrile, methanol, ethanol, chloroform and acetic acid were purchased from Merck and were analytical or HPLC grade. Methacrylic acid (MAA) as the functional monomer, ethylene glycol dimethacrylate (EDMA) as the cross-linker and α,α′-Azoisobutyronitrile (AIBN) were purchased from Merck (Hohenbrunn, Germany). MAA was distilled under vacuum to remove the inhibitor prior to polymerization.…

Tara Ghaemi 9/16/16 Chao Li 232 Recrystallization of Acetanilide Introduction In this experiment, acetanilide will be purified to remove its two impurities by utilizing dissolution, hot vacuum filtration, and recrystallization. Hot vacuum filtration is performed to separate the crystal from the solution that it is present in. Hot vacuum filtration works best for this experiment because it prevents the premature crystallization of the solute, and thus lets the extracted crystal be extremely…

There were a few practical problems when going through the steps in the extraction and purification of paracetamol from tablets. A problem that could be faced with this is accuracy. This would be an issue if the scales were not fully set to zero. This could be overcome by calibrating the spirit level. Also it takes time for it to fully reach its weight on the reading so you may move them too quick before the right weight has been set. Too add to this the propanone may not be filled to the…

There are factors that can affect the enzymatic activity. Enzymes are known to speed up the biological reactions. It is specific to its substrate which in this experiment is known to be catechol. The catechol oxidase is used in all parts to express the concentration in the enzyme reacting into ortho-quinone (Schultz, 2006). The catechol oxidase if from the potato that was used in this experiment. The enzyme was extracted as the full strength after centrifugation and used the homogenization as…

biology and science courses. The reason why I say this is that the process that information is taught in the lecture course was a bit different from how some other courses would normally be taught. Comparing this course to previously biology and chemistry courses, this course focuses on the why rather than what is the answer. This certainly helps as it makes up need to find a connection to why some is the way it is, which benefits many of the different topics that are taught through the course. …

Topic: Identifying Unknown Substances. Equipments: • 5 test tubes. • 1 beaker of Acid 1 beaker of water • 4-Litmus papers • 2 Pipette bulbs. • 1 robber stopper. • 1 Bunsen burner. • Q-tips(4). • Scoopula. Observation: Which substance is which? Hypothesis: All the unknown substances that we have are soluble in water. Procedure • We had a 4 test tubes filled with small amount of white powder. We labeled each test tube. For example the first test tube was labeled as “Substance A” , the second…