Acetic anhydride

colorless. The experiment goal of the lab is to determine the concentration of acetic acid (CH3CO2H) in the commercial white vinegar brand. Procedure and Data Statement The complete experimental procedure is available in the General Chemistry Laboratory Manual for CSU Bakersfield, CHEM 211, pages 60-61, 64-65. Experimental data recored on the attached data pages 62-63, 66-68. Discussion…

Using qualitative analysis, two cations in an unknown solution was identified. After repeated mixing, centrifugation, and decanting, lead was confirmed in Part A and barium in Part B. In Part C, different colored flames of metal species were observed using cation flame tests. Formula unit, total ionic, and net ionic equations were then composed for the identified cations. If the experiment were to be repeated, step 13 could be ommitted as barium was already confirmed in step 12 with the…

REFLECTIONS FOR LAB 4- FRICTION Lab 4.1 to 4.3 is about all the different frictions. We did 3 different labs. 4.1 was pulling a block across different surfaces and finding the difference in friction. 4.2 was about pulling multiple blocks across different surfaces and finding the difference in friction. 4.3 was about pulling blocks but in a bigger surfaces area. In Lab 4.1 we had to pull different blocks across different surfaces. The surfaces were a tabletop, wax paper, paper towel, fine…

For this experiment, a group was employed by the Environmental Protection Agency as analytical chemists. Their goal was to identify an unknown compound that has been discovered in a landfill in their hometown. Once they identified the compound, they would then have to determine both the chemical and physical properties of the compound in order to inform the townspeople of any potential dangers. During the first week of lab, the group was given a small bottle containing an unknown white…

Purpose To determine the specific types of pigments found in a rose leaf and rose petal by using isopropyl alcohol (C3H8O) in paper chromatography. Scientific Explanation When leaves are mixed with isopropyl alcohol (C3H8O) the alcohol draws out the leaf pigments and chemically change to a solvent. When the solvent is painted on the paper towel nothing happens but when a bit of alcohol is added it easily climbs up the paper towel. This happens because the alcohol molecules are “sticky” and…

As a result, lactose is a competitive inhibitor. In the presence of the inhibitor, the slope of the Lineweaver-Burk plot becomes the equation below. Using equation 7 along with the Km and the Vmax from series A, the Ki of Series B and C were calculated. The concentration of inhibitor for 50mM lactose was found to be 35714 μM using equation 1. Similar to the substrate concentration, the inhibitor concentration can be found using the same equation, but substituting in the inhibitor molar…

was poured into the beaker while heated for 2 additional minutes. The solution was then cooled in an ice bath for 30 minutes. The solid-liquid product was then finally poured on a pinch of sodium acetate trihydrate crystal seeds to form ethanoic anhydride. This experiment was ultimately conducted in order to find the proper ratio of sodium acetate trihydrate to water that would give the best yield. In observational terms throughout the experiment, when sodium acetate trihydride was heated, a…

Conclusion Throughout all the test tubes that were observed, it is simple to classify samples as mixtures, compounds, or elements by viewing the particles that make it up on a picture representation. It is not as uncomplicated as observing the physical substance. Test Tube A consisted of small black and white specks that could phyically be seperated when holding a magnet to the mixture. Because this is possible, it is a heterogenous mixture also because the seperation can easily be seen.…

The little instruction leaflet included in the pack, isn't particularly comprehensive, but still it was fairly easy to work out what I needed to do and before I could start I did need to do a little preparation. The instructions did state that I would be needed cold water but didn't say whether that water needed to have been boiled first or left to stand so that any chlorine could dissipate. As I do usually boil the water that I am going to use in a home brew and further along in the…

The purpose of this lab was to iodonize salicylamide and characterize the product in order to determine its structure. The crude product of this reaction was recrystallized using ethanol. The white crystalline product was isolated using vacuum filtration and characterized. The percent yield of this reaction was determined to be 39%. The observed experimental melting point of the product was determined to be 235-137 oC. When compared to the literature melting point 228 oC of the predicted product…