mentioned household items can contaminate our waters. You will also see how environmental items such as sand, charcoal, and gravel can act as a filter to filter out some of these pollutants. Furthermore, you will see that tap water and bottled water both contain chemical components such as, Chlorine and Phosphate. A collection of all this data suggests that whether you prefer tap or bottled water, none of it is 100 percent pure. Introduction Fresh water is one of our most fundamental
---H3PO4-→ CH3CO2C6H4CO2H + CH3COOH The purpose of the lab is to create aspirin using recrystallization and validate its purity by determined by reaction of the product with Fe^+3. The hypothesis is that the aspirin was pure. Recrystallization is a way to separate; the object is to accumulate one part of a solid mixture that is pure and not contaminated from the rest of the mixture. According to Experiment 5: Synthesis of Aspirin in the General Chemistry Lab Manual, there are three steps for
tested negative along with the third container of distilled water which tested negative on the meter. For four container of salt solution it tested positive and the sucrose solution showed a faint light from the bulb registering as slightly conductive. Using new containers (2) one was marked with Expo and the other with sharpie. In the first test distilled the Expo but not sharpie. It redone again, this time with sugar water, and salt water. Both yield the same results, in which both dissolved the
Prepared two types of agar for the project in the lab as when the real experiment later using urine specimen would give better outcome. The two agars are Eugonic agar and basic agar powder. The purpose is to compare between those agars when streaking the bacteria later. Basically, Eugonic agar has a purpose
Introduction The identification of a microorganism is not only vital in a microbiology lab, but also in the medical and pharmaceutical fields. Knowing the identity of a microorganism has helped diagnose numerous diseases, discover the source of the pathogen, and has provided patients with effective treatments such as antibiotics. In addition, the morphology of a bacterium and an arrangement of biochemical tests are utilized to identify an unknown bacterium. In this experiment, students performed
grams. In order to find the percent yield, stoichiometry must be used to find the numbers needed to plug into the percent yield equation. Stoichiometry helps find the theoretical yield, which is needed to find the percent yield. For experiment six, the lab book stated the percent yield of a highly effective synthesis would range from 90-100%
and becomes a nucleophillic carbon. Anhydrous diethyl ether is used as the solution in this experiment for three reasons. First, it has a low boiling point so it is easy to remove from the final product. Second, it is inexpensive. Third, there is no water in this solution, which is extremely important when dealing with Grignard reagents.
I. Introduction The main objective for Chemistry 1212K laboratory is to familiarize students with basic yet critical techniques needed to further pursue a career in the science field. The goal for Chemistry 1212K lab was to determine the unknown formula of a synthesized cobalt-ammonia-halide product through a combination of experiments. The only way to calculate the particular chemical relationship was through finding the percent Cobalt, percent ammonia, and percent halide (either Cl- or Br-) and
Lauren Calso September 29, 2014 BIOL 240 Lab Report Gram Stain Introduction Various methods are used to identify unknown bacteria. A popular method to determine unknown bacteria is called a Gram Stain. A stain is coloring a specimen with dye. A Danish physician named Hans Christian Gram developed the Gram stain method in 1844. He studied at the University of Copenhagen and became a professor of Medicine. When differentiating between two types of pneumonia, he found that most bacteria are either
Qualitative analysis, an analysis to determine the identity of a compound, was done on an unknown solution 4, passed by the Teaching Assistant at the beginning of the lab, to identify the cations contained. This unknown solution was known to contain two of four possible ions. The first section or Part A was to determine the existence of either lead ion or silver ion and the second section or Part B to determine the presence of barium ions or calcium ions. In addition, the cation flame test was used