The following enamine is in equilibrium with which compounds when in trace acidic conditions? a. 2-butene, N(CH3)2H b. 2-butanone, N(CH3)2H c. butanal, N(CH3)2H d. 2-butene-1-ol, LIAIH e. butanoic acid, N(CH3)2H N(CH3)2
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- Which species is the stronger Lewis Acid? Why? (Use resonance structures to explain your answer.) BH3 or trimethoxyborateWhich of the compounds listed below will produce a slightly basic solution when dissolved into water? -Sr(CIO2)2 -BaBr2 -KI -CH3CH2NH3BrConsider the following compounds that vary from nearly nonacidic to strongly acidic. Draw the conjugate bases of these compounds, and explain why the acidity increases so dramatically with substitution by nitro groups.CH4 CH3NO2 CH2(NO2)2 CH(NO2)3 pKa ≅ 50 pKa = 10.2 pKa = 3.6 pKa = 0.17
- 1. Rank the following species in order of increasing acidity. Explain your reasons for ordering them as you do. HF NH3 H2SO4 CH3OH CH3COOH H3O+ H2O2. Consider the following compounds that vary from nearly nonacidic to strongly acidic. Draw the conjugate bases of these compounds, and explain why the acidity increases so dramatically with substitution by nitro groups. CH4 CH3NO2 CH2(NO2)2 CH(NO2)3Which of the ff statements is false? In aqueous solution the order of base strength R3N > R2NH > RNH2 > NH3. Alkyl groups increase the electron density on nitrogen, making the amine more basic. Alkyl groups stabilize the positive charge on the conjugate acid making the ammonium ion less acidic. Solvation through H-bonding with water is more important in the conjugate acid than in the free amine.Suppose you have a mixture of these three compounds. Devise a chemical procedure based on their relative acidity or basicity to separate and isolate each in pure form.
- Because phenol (C6H5OH) is less acidic than a carboxylic acid, it can be deprotonated by NaOH but not by the weaker base NaHCO3. Using this information, write out an extraction sequence that can be used to separate C6H5OH, benzoic acid, and cyclohexanol. Show what compound is present in each layer at each stage of the process, and if it is present in its neutral or ionic form.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 repulsionWhich of the following can inhibit nitrification? 1. Low HNO2 2. High NH3 3. High NH4+ 4. pH < 5 5. Low HCO3- 6. High HNO2 7. High NO2
- Predict the stronger acid between the pair of acids and explain your answer. a.I3CCH2CH2COOH and CH3CH2CCL2COOH.Chemical Equilibrium Write the equilibrium-constant expressions and obtain numerical 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 ammonium hydrochloride, CH3NH3Cl. (d) the basic dissociation of NaNO2. (e) the dissociation of H3AsO3 to H3O+ and AsO33- Using step-by-step process1. Write the equilibrium-constant expressions and obtain numerical 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 ammonium hydrochloride, CH3NH3Cl.(d) the basic dissociation of NaNO2 .(e) the dissociation of H3AsO3 to H3O + and AsO33- 2. The chemicals A and B react as follows to produce C and D: A + B ↔ C + DKe = [C] [D] [A] [B] The equilibrium constant Ke has a value of 0.30. Assume 0.20 mol of A and 0.50 mol of B are dissolved in 1.00 L, and the reaction proceeds. Calculate the concentrations of reactants [A], [B] and products [C], [D] at equilibrium. Using step-by-step process