You are given a mixture of the compounds shown below. Which of these compounds would you be able to isolate using acid base chemistry? HO HO HO H₂N. A B C D E Please show you workings for this question. (i) Identify the functional groups of the molecules that can be isolated; (ii) Draw a full flow diagram of the the separation and include the reagents used and any intermediate structures. A B ய ☐
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- b) Rank the following molecules according to their acidity. Justify your answer. O OH NO₂ O OH CH 3 O OH CIMany multi-step organic reaction mechanisms involve proton transfer steps. For example, the first step of Fischer esterification of carboxylic acids(as shown with acedic acid) is activation of the acid by protonation. Based on your understanding of which reaction pathway is more favorable, explain why using chemical structures.(b) Calculate the pH of 0.0005 mol dm3 ethanoic acid when its pKa = 4.75 CH3COOH( CH3COO() + H™ Ka = pH =
- Phenol (hydroxybenzene) behaves as a weak acid. a) Write out the equilibrium equation for its partial dissociation in water. b) Write out the expression for the acid dissociation constant, Ka. d) Draw the conjugate base of phenol and show how it is stabilised by resonance. e) Compare and explain the acidity of phenol (p = 9.9) with that of: cyclohexanol (pk = 16.0) 3-fluorophenol (pK₁ = 9.3) 4-acetylphenol (pK, = 8.1)Inspect the structure of the following compounds and explain which one will elute first andwhich one will be last to elute.5. Which of the following equations shows that isoquinoline, C9H;N, behaves as a Bronsted-Lowry base in water? a) CóH;N(aq) + H2O(1) = b) CH;N(aq) + H2O(1) c) C9H;N(aq) + OH¯(aq) = d) CoH;N(aq) + H;O*(aq) e) CoH;NH*(aq) + H2O(!) C9H;NH*(aq) + OH (aq) = C9H&N°(aq) + H;O*(aq) C9HN¯(aq) + H;O(!) = C9H;NH*(aq) + H2O(1) = C9H;N(aq) + H;O*(aq)
- (i) Identify the acidic proton(s) for each of the following carbonyl compounds: O O ( CHỊCH, CÁCH, BỊ CHỊCHỊCH, CÁCH, (2) || (3) CHy-O-C-CH,-C-O-CH, (4) CH,-C-CH, (ii) Rank the compounds (in part (i) above) in the order of increasing or decreasing acidity by using the symbol "" in your answer.Write the products of these reactions. Use single or double arrows as appropriate. When you are done, label the acid and base on the left side and the conjugate acid (CA) and conjugate base (CB) on the right side. (a) PO43- + CH3NH3+ (b) H2O + H2SO4Propose two molecular formulas for each of the following molecular ions: (a) 72; (b) 100; (c) 73.
- Draw the structure of the product of the reaction between the compound shown below and H,SO. CH3COCH2CH3 • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. • If the reaction involves proton transfer, draw the products in separate sketchers. • If the reaction is a Lewis acid-base reaction, draw the product in one sketcher only. CP opy aste 翻 券 網What will the organic product of the following reaction be? Br NH₂ D). ii) base/basisIn an attempt to synthesize compound C through a two-step process, a chemist discovered after completing the first step that they had inadvertently produced two distinct compounds, A and B. Upon examining the infrared spectroscopy (IR) results, it was observed that both A and B exhibited peaks indicative of a ketone and an ester group. Please provide the molecular structures of A and B. OEt NaOEt ΕΙΟ A B In a chemical experiment, they noticed that both components, A and B, from a combined sample turned into a new compound, C, during the following stage. The task is to determine what compound C looks like and explain how compound A or B changes into compound C through a reaction. Compound C should be the primary molecule containing carbon created in this process, not just a by-product. A B H3O+, H₂O, A Mechanism = с