The C-H bond in acetone, (CH3)C=O, has a pką of 19.2. Draw two resonance structures for its conjugate base. Then, explain why acetone is much more acidic than propane, CH;CH,CH3 (pKa = 50). %3D
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- Arrange the compounds in each set in order of increasing base strength. consult Table 4.1 for pKa values of the conjugate acid of each base.Using pKa Values to Determine Relative Acidity and Basicity Rank the following compounds in order of increasing acidity, and then rank their conjugate bases in order of increasing basicity.Thiocyanic acid (HSCN) is an inorganic acid (pKa = 1.1 at 25 °C) that can be classified as “strong” largely due to resonance stabilization of its conjugate base, thiocyanate (SCN– ). In the space provided below, draw Lewis electron dot structures of SCN- and all of its important resonance forms.
- Given that the Ka value for acetic acid is 1.8 × 10−5 and the Ka value for hypochlorousacid is 3.5 × 10−8, which is the stronger base, OCl− or C2H3O2−?Put the following compounds in order from weakest acid to strongest acid. Explain (pKa values are not enough and trends should be considered).Which species is the stronger Lewis Acid? Why? (Use resonance structures to explain your answer.) BH3 or trimethoxyborate
- The pKa of three CH bonds is given below.a.For each compound, draw the conjugate base, including all possible resonance structures. b. Explain the observed trend in pKaRegarding to the following compounds: NH3, H2O, H2SA) Rank the following compounds in order of increasing acidityB) Mention their conjugate bases and rank according to increasing their basicity orderdentify 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-1
- Asteltoxin, isolated from cultures of Aspergillus stellatus, exhibits a potent inhibitor on E. coli BF1 ATPase activity. During S. L. Schreiber's synthesis of asteltoxin, substance 1 was treated with a strong base to form anion 2. a) Identify the most acidic proton at 1 and justify your choice using all the necessary representations.Arrange the following organic molecules in order of increasing acidity, starting with the least acidic and explain your answer CH3CH3, HC≡CH and CH2=CH2The C – H bond in acetone, (CH3)2C = O, has a pKa of 19.2. Draw two resonance structures for its conjugate base. Then, explain why acetone is much more acidic than propane, CH3CH2CH3 (pKa = 50).