What might have been the product ratios observed in this experiment if an aprotic solvent such as dimethyl sulfoxide had been used instead of water?
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What might have been the product ratios observed in this experiment if an aprotic solvent such as dimethyl sulfoxide had been used instead of water?
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- What is the function of the sulfuric acid in the dehydration of alcohols to form alkenes? Why was it important to keep the Gas chromatograph close to room temperature during the analysis of the alkene mixture?We used to perform this experiment using diethylether or THF as the reaction solvent. We now use DCM, which has similar solvent properties. Give a practical reason for the change to DCMCalculate the Initial Concentration, in units of Molarity, for each reagent used in each of the three trials in this experiment.
- Potassium dichromate was used in the chromic acid preparation. Would there be a difference if chromium trioxide was used? Explain your answer.Write the reaction involved in Ferrox Test. a. What is the species responsible? b. Why is phenol negative in Ferrox Test? Based on the theoretical result, what is the order of reactivity of primary, secondary, and tertiary alcohols in the Lucas Test? a. Lucas Reagent contains ZnCl2 in HCl. What is the role of ZnCl2? What reagents are used in the esterification of Alcohols and Phenols? a. Write the reaction involved in Primary Alcohol (Ethanol) and Acetyl Chloride b. Write the reaction involved in Phenol and Acetyl Chloride What is the purpose of the Chromic acid test? a. What are the reagents used? b. Write oxidation reaction of Primary Alcohols and Secondary Alcohols1. Several procedures for the analysis of caffeine involve extracting the caffeine into an organic non-polar solvent (such as methylene chloride CH2Cl2). This about your experiment and what is discussed in the introduction. What might the advantage be for this approach? What is a disadvantage? 2. Think about what you said in the question above. If your sample was espresso, would your answer change? Why? 3. I was careless and ended up using a wavelength other than the peak (Say 250 nm). Would I still be able to carry out the experiment successfully? What might be the reason that I do not get optimum results? 4. I carried out the experiment using a scratched (or several scratches) cuvet for one standard, and clear cuvets for others. How might my calibration curve change (improve or get worse and why)? Pllllz answer these questions as soon as possible
- 1. Occasionally, a crossed Cannizzaro reaction is carried out to reduce benzaldehyde derivatives to the corresponding benzyl alcohol, utilizing formaldehyde as the reducing agent. i) Please show the mechanism by which this occurs.Three sample, X (neutral), Y (basic), and Z (acidic), were mixed and dissolved together in dichloromethane. Propose a method to separate all given sample individually using the combination of liquid-liquid extraction, crystallization, distillation, and sublimation technique.In addition to a low boiling point and immiscibility with water, why is density important to consider in the selection of an extraction solvent? Would an organic liquid with a density of 1.006 g/mL make a good extraction solvent? Explain.Write the chemical reaction that took place during this experiment.
- Which qualitative analysis test from this module can help distinguish between different kinds of ketones? Can this same test give a positive result for 4-methylacetophenone? Why?How iso-butane is used to ionize the given sample.2. Calculate the percent yield step if you start with 2.687 g of salicylic acidwith excess of acetic anhydride and the amount of aspirin obtained was 2.301 g. 3. Explain why acetic acid is unlikely to be a contaminant in your solid aspirin. 4. If you measured the melting point of the solid product from this experiment andobtained a melting range of 122-128 °C, what does this tell you? 5. Aspirin that has been stored for a long time and gives a purple color with FeCl3 (Tests for Functional Groups). What reaction would cause this to happen?
