Analytical chemistry

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…

Cobalt: The element Cobalt it is located on the periodic table, Group 9. Cobalt is the 27th element on our Periodic Table. It is a chemical element, it has a density of 8.9 grams per cubic centimeter. Cobalt has a boiling point of 3,100 degrees Celsius (5,600 degrees Fahrenheit). Cobalt’s symbol is Co, The atomic # is 27 so the protons and electrons are 27 as well. Cobalt has an atomic mass of 59 and 32 neutrons. The melting point is 2,719 degrees Fahrenheit. This element was discovered in…

In lab, a sample of crude caffeine was purified using the technique of sublimation. Thin layer chromatography (TLC) was used to verify the caffeine's chemical structure and purity. Sublimation played a huge role in the purification of the crude caffeine. The process of sublimation is to take a chemical and change it from a solid phase directly into a vapor. Another reason as to why sublimation was used is because the caffeine can be separated from its contaminant due to the fact that it does…

The materials used in this project were general protective personal equipment such as lab coat, gloves and googles, 125 milliliter Erlenmeyer flask, 50 milliliter burette, 50 milliliter beaker, graduated cylinder, scale, vitamin c, phenolphthalein, methyl orange, deionized water and the following chemicals: sodium hydroxide, potassium hydrogen phthalate, hydrochloric acid and sodium bicarbonate. When it comes to these chemicals, make sure to wear the general protective personal equipment and…