A functional group is an identity of a certain family compound. It decides compound's chemical properties and how the compounds in the family will react. In this experiment, we study about alkenes, a functional group that consists of one double bond. Specifically, we will learn about hydration of (+) - α - pinene, an alkene by hydroboration-oxidation reaction. Also, we will discover its regiochemistry and stereochemistry.
Synthesis of Methyl Stearate Post-Lab Submitted by Matthew Sharma TA: Evan Determining the Limiting Reagent Methyl Oleate (MW= 296.49 g/mol) Amount used = 1.141g (1.141g)(1mol / 296.49g) = 0.003848 mol ∴ The limiting reagent for the reaction is methyl oleate because hydrogen is used in excess Theoretical Yield Methyl Stearate (0.003848 mol)(298.504g/mol product) = 1.1486 g methyl stearate Percent Yield Given the 1:1 stoichiometry of the reaction: 100% x (0.2551g product / 1.1486g theoretical yield) = 22.2% Conclusion A 22.2% yield of synthesized methyl stearate was obtained via the catalytic hydrogenation of methyl oleate in the presence of the catalyst 10% palladium on carbon. The product
57 (1) (iii) A triglyceride is also formed in the reaction between glycerol and three molecules of oleic acid, C17H33COOH. State and explain which of the two triglycerides (the one formed from stearic acid or the one formed from oleic acid) has the higher melting point. (the one from) stearic acid; saturated / no (C to C) double bonds; chains pack close together / stronger intermolecular forces / van der Waals’ forces etc; 3 Ignore hydrogen bonding. If wrong choice made, only third mark can be scored. (3) (b) An oil sample containing 0.0100 mol of oil was found to react with 7.61 g of iodine, I2.
pyridinium hydrobromide perbromide type of stationary phase column length column temperature rate ﬂow of the carrier gas List the 4 general factors that affect the separation obtained on a gas chromatograph What speciﬁc technique is used to collect/isolate your puriﬁed unknown compound at the end of the recrystallization experiment? suction ﬁltration 14 of 22 4/16/12 9:15 PM StudyBlue Flashcard Printing of Lab Final 2211L UGA
Abstract: The aim was to react trans, trans-2,4-Hexadiene-1-ol with maleic anhydride. The reaction was a Diels-Alder reaction and it produced cis-1,3,3a,4,5,7a-Hexahydro-5-methyl-3-oxo-4-isobenzofuran-carboxylic acid. This reaction gave a percentage yield of 72%. The reaction product was purified and the melting point of both the crude and purified product was found. The purification step reduced the percentage yield to 47%.
A. II only B. III only C. II and III D. I only 6. A hydrate is a A. buffer solution of water B. compound in which hydrogen is combined with an element less electronegative than itself C. compound containing a definite number of water molecules in its chemical composition D. salt containing the hydroxyl radical 7. Two moles of hydrogen react with 1 mole of oxygen to produce which of the following? A. 1 mole of water B.
The results showed that tube 2 had the fastest rate of reaction; this tube was exposed to the neutral pH of 7. The results showed that tube 3 had the second to fastest reaction time; this tube was exposed to the more basic pH of 9. Tube 4 was the control tube and reacted the third fastest. The conclusion of the experiment is that the enzyme catecholase and its substrate catechol react the most efficiently in their most optimum pH level of 7, which is neutral. The catecholase enzyme and its substrate catechol cannot react in a pH level of 3, which is too acidic.
Ethan D. Wilhelm September 10, 2012 Chemistry 121 section 8 Friday 9-12 Sarah Gains Unknown Substance Lab Purpose: The purpose of this lab was to identify an unknown substance B by finding enough of its physical properties that we could eliminate all substances it can’t be. We use micro lab to help us find the boiling point, freezing point and mass. Then we tested the solubility of the unknown substance in water, hexane, and Alcohol. With this information we were able to find the identity of the unknown substance B. Procedure: Throughout this lab we were finding the physical properties of substance B.
- signs of chemical change = changes the shape and color, creates a gas, distributes heat, Etc. - Chemical Change= Substance is formed into a completely new substance 2. Hypothesis: If the copper is being tested in these metals ( Copper, Magnesium and cupric chloride) then it would be the least reactive out of magnesium and zinc because it is the lowest among the three on the activity series. 3. Experimental Design: - Independent Variable: different types of metals: magnesium, zinc and Copper - Dependent Variable: amount of reactants observed for each metal - Control : The Air -Constants: The amount of chemical solutions, the time the metals were in the chemical solutions and size of each metal during the experiment 4.