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- In the following acid - base reactions, a) Draw Lewis structures of the reactants and the products. b) Determine which species are acting as electrophiles (acids) and which are acting as nucleophiles (bases). c) Use the curved - arrow formalism to show the movement of electron pairs in these reactions and the imaginary movement in the resonance hybrids of the products. d) Indicate which reactions are best termed Brønsted-Lowry acid - base reactions i. CH3CHO + HCI-- > CH3CH2O + + Cl- ii. CH3CHO + OH- - - > CH3CO-(OH) HThe hydrocarbon fluorene was treated with potassium t-butoxide in an acid-base reaction, giving the fluorenide anion and t-butyl alcohol. (a) Which way does the equilibrium lie, and by how much? b) What is the proportion of the fluorenide anion to fluorene? (c) Why is fluorene so highly acidic, considering the pKa of an average alkane is above 50?но HO но он The pK, of ascorbic acid (vitamin C) is 4.17, showing that it is slightly more acidic than acetic acid (CH3CO0H, pKa 4.74). (a) Show the fou r different conjugate bases that would be formed by deprotonation of the four different OH groups in ascorbic acid. (b) Compare the stabilities of these four conjugate bases, and predict which OH group of ascorbic acid is the most acidic. (c) Compare the most stable conjugate base of ascorbic acid with the conjugate base of acetic acid, and suggest why these two compounds have similar acidities, even though ascorbic acid lacks the carboxylic acid (COOH) group.
- 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)4. The pk, of vanillin is about 9, which is much more acidic than a normal alcohol. Draw a reaction showing the deprotonation of vanillin with NaOH, and then draw six resonance structures of the conjugate base. Draw the hybrid structure and clearly indicate how the negative charge is distributed in the compound.3. How would you separate these to compounds using acid-base chemistry? (a) Identify all functional groups; and (b) Draw a flow diagram of your separation process. H3N HO
- Write the equilibrium-constant expressions and obtainnumerical values for each constant in. (a) the basic dissociation of aniline, C6H5NH2. (b) the acidic dissociation of hypochlorous acid,HClO. (c) the acidic dissociation of methyl ammoniumhydrochloride, CH3NH3Cl. (d) the basic dissociation of NaNO2. (e) the dissociation of H3AsO3to H3O+and AsO33-. (f) the reaction of C2O42-with H2O to give H2C2O4and OH-. show solutionPlease answer both the parts or don't answer give a small explanation.At pH 3.0, what percentage (in %) of lactic acid is in its deprotonated form? Hint: The pka of lactic acid is 3.86.
- Picture 1 )Provide the functional group contained in each lettered compound: Choices:acid halidealcoholalcohol and ketoneamideanhydridecarboxylic acidesterketone Question 2 Indicate whether an acid–base reaction takes place under each of the conditions given. Choices yesno A: phenol + waterB: phenol + NaOH C: diethyl ether + NaOHD: ethanoic acid + NaHCO3E: ethanoic acid + NaOHF: Ethanoic acid + waterHypoglycin A, an amino acid derivative found in unripened lychee, is anacutely toxic compound that produces seizures, coma, and sometimesdeath in undernourished children when ingested on an empty stomach. (a) Draw the neutral, positively charged, and negatively charged forms of hypoglycin A. (b) Which form predominates at pH = 1, 6, and 11? (c) What is the structure of hypoclycin A at its isoelectric point?First calculate the number if moles of the given compounds.

