6.7, 6.8 Synthesis, Decomposition, and Displacement Reactions Kelly Mok SNC2DE-A Mr. Cox Partner: Nidhi S. Lab performed: September 18 & 19, 2014 Due: September 26, 2014 Purpose The purpose of this experiment is to observe and compare synthesis, decomposition, single displacement and double displacement reactions and the physical and chemical reactions that occur as a result. Hypothesis
Pages 96-98 in Chemistry 110 Lab Manual. Wilfrid Laurier University, ON, Canada. Abstract: The purpose of this experiment was to determine the level of purity by using the values for melting point and absorbance and chemically synthesizing aspirin by using phosphoric acid as a catalyst.
Therefore, liquid-liquid and acid-base extraction techniques were successfully performed to separate the components of the Excedrin tablet. According to the TLC analysis results, the compounds (aspirin, acetaminophen, and caffeine) were successfully isolated from the analgesic (Excedrin tablet). In figure 1, the separation of the compound in the TLC analysis correlates with the TLC analysis in figure 2. Furthermore, Rf index calculations of the TLC analysis demonstrated that the compounds (aspirin, acetaminophen, and caffeine) were separated. The Rf calculations of aspirin in table 1 shows an Rf value of .491; however, in table 2 the Rf value of aspirin was calculated to be .784.
Abstract During this experiment we will produce Isopentyl Acetate via the fisher mechanisms. The alcohol group is converted into an ester giving off a banana scent. This reaction does not favor the products therefore we must add an excessive amoinut of Acetic Acid to shift the equilibrium to favor the products. Our results showed a successful reaction by comparing our boiling results and infrared results to the textbook data on Isopentyl Acetate. Introduction Isopentyl Acetate is an ester that is commonly referred to as banana oil, this is due to the similarity in odor of bananas.
Based on this lab, FTIR spectroscopy affirmed functional groups present in Unknown 30A because it revealed specific transmittance bands for those functional
The experiment proved that with the execution of proper techniques, esterification is the a very efficient method regardless of the results obtained in this experiment. The experiment demonstrated the effectiveness of the esterification through the
(1 point) What is the desired catalytic reaction and the primary undesired reactions and explain the enthalpy terms? The chemical equation representing the desired catalytic reaction is the selective hydrogenation of CO2 to produce methanol, which can be written as follows: CO_2 + 3H_2 → CH_3 OH + H_2 O In this equation, carbon dioxide (CO2) and hydrogen gas (H2) react in the presence of a catalyst to produce methanol (CH3OH) and water (H2O).
Chemical Reactions March 25, 2024 Marcia Rowe Instructor: Julie Wenz CHMY 105- Exploration of chemistry Introduction: The objective of the chemical reaction experiment is to gain familiarity with several types of chemical changes through the implementation of a series of tests. Chemical reactions are processes that typically involve a chemical change, where the initial substances (reactants) differ from the resulting products. The presence of an arrow indicating the product signifies the occurrence of a chemical change. This experiment involves making observations, collecting data, and recording the outcomes.
Factors that affect chemical reactions Intro: this experiment is to show us what factors affect the rate of a chemical reaction. Supplies: The Works Liquid Toilet Bowl Cleaner, TUMS antiacid tablets, a non-serrated knife, a spoon, a stirring rod, four test tubes, flame heater, a small beaker for the boiled water, rubber gloves, and safety goggles. Procedure: we filled a beaker 3/4 of the way full with tap water and brought the water to a boil. We then labeled our test tubes 1,2,3,4.
Purpose: DNA, also known as deoxyribonucleic acid is found in all living organisms. It was what holds genetic information. DNA is a genetic code that is composed of four components adenine, guanine, cytosine, and thymine also referred to as bases. These components make-up DNA and form a double through the base pairing of adenine to thymine and guanine to cytosine. Adenine is a purine nucleobase, a six-membered nitrogen ring fused to a five-membered nitrogen ring.
ABSTRACT The Diels-Alder reaction has been an area of great research interest with regards to enhancing enantioselectivity in the reaction by use of various catalysts and reaction conditions. INTRODUCTION In organic chemistry, a Diels-Alder reaction refers to a 4, 2 cycloaddition between a diene consisting of alternating double bonds and a substituted alkene (the dienophile) resulting in a substituted cyclohexene system. The reaction is often used to reliably control regioselective and enantioselective aspects in organic synthesis.
The lab, Ester Synthesis, main purpose was to illustrate if chemists can create different smells, from mixtures, in the laboratory. We began by creating a hypothesis from scratch, not knowing anything about what we’re working with, and ended up with a hypothesis which stated the mixtures present for this lab, Acetic acid, Butyric acid for our Carboxylic Group (Putrid smell), and our alcohol listing was isopentanol, butanol, and ethanol. Before we even began the lab, my group and I were already aware that to be a putrid smell, you must have a -ic acid ending to your molecular name or you must have two oxygen atoms present in your structural formula, however, the molecular formula was not needed, so we put that idea to aside. Below you can see
To go in more depth, 98.2% is a high yield, despite the inaccuracies due to time constraints, and the inability to the recrystallize the benzoic acid. As mentioned earlier, product might have been lost during the many filtration procedures in the experiment, as not all of the product was poured out from the flask, onto the filter. Since, recrystallization could not be done, the benzoic acid was immediately transferred onto the watch glass, and it is when transferring some product could have been left on the filter. Overall, pouring product into the filter, and trying to get every particle of product from the flask for each filtration procedure in the experiment, is rather difficult, and is impossible to get every bit of product. Another key possibility, though it fortunately did not occur in the experiment, a green, or purple result
The helicase enzyme initiates the DNA process by unwinding the double helix. If it was missing, the DNA would not be able to replicate as the helix structure would not open. The next step of DNA Replication is the binding of RNA primase in the the initiation point of the 3'-5' parent chain. RNA primase can attract RNA nucleotides which bind to the DNA nucleotides of the 3'-5' strand due to the hydrogen bonds between the bases and also provide a starting point for DNA polymerases to extend from. Without it, the DNA nucleotides would not have something to bind to and to start the DNA synthesis.
Two small additional peaks at δ = 0.8 and δ = 1.6 were found may be due to impurities present. 1H-NMR spectrum of PHA isolated from glucose or molasses media indicated characteristic signals of PHB, namely a doublet at 1.26 ppm, which is attributed to the methyl (CH3) group coupled to one proton while a doublet of quadruplet at 2.51 ppm due to the methylene (CH2) group adjacent to an asymmetric carbon atom bearing a single proton. The third signal at 5.25 ppm, which was attributed to the methine (CH) group. 1H-NMR is a very sensitive method for determining the domain size and miscibility, which is difficult to identify by conventional microscopic or thermal analysis (Kichise et al., 2002).The values of the chemical shifts as well as the assignments of the 1H-NMR signals, which appeared in the spectra are in agreement with results obtained by Kichise et al.
