Organic Chemistry

4. For the following compound, determine which base(s) are strong enough to efficiently deprotonate the molecule and favor the equilibrium products.

4. Calculate the transition energies for (1) for all solvents using the absorption maxima values collected by groups A, B, C and D.

Objectives (1 pt): identify the overall goal of the lab and briefly mention the methods used in the experiment along with relevant minor goals.

Experiment 3: (Determination of the composition of an unknown mixture using extraction based on acid/base properties

A 13.33 mL sample of vinegar (HC2H302, MW = 60.08) is titrated with 0.3534 M Sr(OH)2 (MW = 171.3). If the sample of vinegar requires 18.31 mL of the Sr(OH)2 solution for complete reaction, determine the molarity of the vinegar. (exam question)

There is a lot of chemistry going on all around you. If you start to observe a bit more intentionally, you will notice many new discoveries, articles, news stories, and breakthrough research happening exerxday. And science can only be useful and keep moving forward if it is shared. For this topic, I want you to find a Chapter Topic in Plant-Based Natural Products: Derivatives and Applications (a book found in the APUS Library) that is interesting to you and share it with the class. https://ebookcentral.proquest.com/lib/apus/reader.action?docID=492 3303&query=organic+chemistry

Preparation of Synthetic Banana Oil (Isopentyl Acetate) Isolation of Chlorophyll and Carotenoid Pigment from Starch Assigned Questions 2. Why is the mixture extracted with sodium bicarbonate? Give an equation and explain its relevance. - Sodium bicarbonate is preferable for this extraction because it will react with any unreacted or residual acid in the mixture to form neutralized solution. The ester, which is water insoluble, would separate from the neutralized acid because it is water soluble. This will increase the purity of the end product. The esterification process cannot be reversed with sodium bicarbonate because it is a weak base. As a result, it can remove the carboxylic acid and sulfuric acid catalysts that have not been reacted. The equation is R-CO-H-->R-CO-(COO-) because the esters are released from the molecule as carbon dioxide and water. 3. Why are gas bubbles observed when the sodium bicarbonate is added? - The reaction of the sodium bicarbonate with the acid emits Carbon dioxide gas, which is observed as gas bubbles. Which reagent is used o the reaction 4. Which starting material is the limiting reagent in this procedure? Which reagent in excess? How great is the molar excess (how many times greater)? - The isopentyl alcohol is the limiting reagent while acetic acid is the excess reagent. The molar excess is about 1.5 – 1.75 times more than the amount theoretically produced. 5. Outline a separation scheme for isolating pure isopentyl acetate from the ro mixture. - The crude product is washed with 10 ml of water before being transferred to a separatory funnel. When the solution forms two layers, the bottom aqueous layer is discarded. After that, the answer is blended with 5 ml portions of 5% sodium bicarbonate until distinct layers emerge; the bottom layer is then drained off. 5 ml portions of 5% sodium bicarbonate are fed continually until the aqueous layer’s pH becomes basic.

4. For the main chemical, provide the relevant reaction (s) in which it is involved.

1. Given the density of acetic anhydride 1.08 g/mL, determine the number of moles of acetic anhydride and which reagent is limiting in eq. 1 above. 2. IR spectra of salicylic acid (starting material) and aspirin (product) are shown on the next page. Determine which spectrum corresponds to each compound, and explain by referring to features in the spectra. 3. Which of the compounds below (A and/or B) would be soluble in aq. NaOH? Why?

5. RESEARCH. Describe the chemical reactivity of your chemical in another context (i.e. other types of reactions it might be involved in, which are not mentioned in this article).