Assign an E or Z configuration to these dicarboxylic acids, each of which is an intermedi- ate in the tricarboxylic acid cycle. Under each is its common name. H. COOH НООС, COOH (a) (Ь) C=C H CH,COOH HOOC H. Fumaric acid Aconitic acid
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- which acid of each pair would you expect to be stronger? based on your answer, provide a reaction of the selected stronger acid forming a carboxylate ion #1Arrange these compounds in order of increasing acidity: 2,4-dichlorophenol, phenol, cyclohexanol.if the pKa value for p-nitrophenol is 7.08, what fraction of it exists in its ionized form at (a) pH 7, and (b) pH 9?
- (a) Arrange the following compounds in an increasing order of their indicated property :(i) Benzoic acid, 4-Nitrobenzoic acid, 3,4-Dinitrobenzoic acid, 4-Methoxybenzoic acid (acid strength)(ii) CH3CH2CH (Br) COOH, CH3CH (Br) CH2COOH,(CH3)2CHCOOH, CH3CH2CH2COOH (acid strength)(b) How would you bring about the following conversions :(i) Propanone to Propene (ii) Benzoic acid to Benzaldehyde(iii) Bromobenzene to 1-phenylethanolWrite out a chemical equation (draw bond-line structure) for the reaction between p-bromoaniline with hydrochloric acid. Show the mechanism using curved arrows AND identify the acid and base in the reactants.Arrange the 3 carboxylic acids below in the order of increasing acidity and explain why you have arranged them in that order: 3-chloropentanoic acid, 4-fluoroheptanoic acid, 3-iodopentanoic acid
- Rank and explain the following compounds in order of increasing acidity. ( indicate 1 more most reactive, 3 for least reactive, and 2 for the middle) a. Acetic acid, 2-chloro acetic acid, 2,2-dichloro acetic acid b. Benzoic acid, p-methylbenzoic acid, p-nitrobenzoic aciddentify the conjugate base in the reaction of propanoic acid CH3CH3COOH reacting with methyl amine, CH3NH2. a. CH3NH2 b. CH3CH3COOH c. CH3NH3+ d. OH-1 e. CH3CH3COO-11. Arrange the test samples in order of increasing reactivity with sodium bicarbonate? Explain briefly -Ethanoic acid, Butanoic acid, Benzoic acid 2. Arrange the test samples in order of increasing solubility in water? Explain briefly. -Ethylamine, Diethylamine, Aniline 3. Arrange the test samples in order of increasing basicity? Explain briefly. -NaOH, Ethylamine, Aniline
- Dicarboxylic acids have two pKa's.- For maleic acid (cis-2-butenedioic acid) these are pKa1 = 2.0, and pKa2 = 6.3- For fumaric acid (trans-2-butenedioic acid) these are pKa1 = 3.0, and pKa2 = 4.5 Which factor best explains why the cis-isomer has a smaller pKa1 and a larger pKa2 than the trans-isomer? a. Intramolecular hydrogen bonding b. Intramolecular steric hindrance c. Selective solvation in water d. Intramolecular dipole repulsion5. Give the structures of the following acids and arrange them in the increasing order of acidity. Give reason.2-Chlorobutanoic acid, 4–chlorobutanoic acid, 3-chloropropanoic acid, 2-chloro propanoic acid and 4-cyanobutanoic acid.Write equations for the following acid-base reactions. Label the conjugate acids and bases, and show any inductive stabilization. Predict whether the equilibrium favors the reactants or products. Try to do this without using a table of pKa values, (a) CH3CH2OH + CH3NH- (b) F3CCOONa + Br3C¬COOH(c) CH3OH + H2SO4 (d) NaOH + H2S(e) CH3NH3+ + CH3O- (f) BrCH2CH2OH + F3C¬CH2O-(g) NaOCH2CH3 + Cl2CHCH2OH (h) H2Se + NaNH2(i) CH3CHFCOOH + FCH2CH2COO- (j) CF3CH2O- + FCH2CH2OH