Organic Chemistry

Questions & Answers

1. For each pair of reagents below, perform the following: A) Identify the most acidic proton. B) Draw the products of the acid-base reaction. C) Draw the curved arrow mechanism for the forward reaction only. D) Label the acid, base, conjugate acid, and conjugate base. E) Determine which side of the reaction is favored and draw the appropriate equilibrium arrow.

2. Rank the following compounds in order of increasing acidity (weakest to strongest).

3. For the following compound pairs, identify the most acidic proton for each molecule and identify the stronger acid. Hint: look for similar patterns in the pK, table.

4. For the following compound, determine which base(s) are strong enough to efficiently deprotonate the molecule and favor the equilibrium products.

6. In solution, aliphatic amines like cyclohexylamine (left, pK, of the conjugate acid = 10.45) are stronger bases than aromatic amines like aniline (right, pk, of the conjugate acid = 4.63). Why?

7. Draw out the products of the following Lewis acid-base reactions and label the reactants as Lewis acid, Lewis base, nucleophile, and electrophile.

Question 52 (0.0001 points) (5 marks) The reaction 2HCl(g) = H₂(g) + Cl₂(g) has Kc = 3.2 x 10-34 at 25 °C. If the reaction vessel initially contains 0.0350 mol L-1 of HCI, what will be the concentrations of H₂ and Cl₂ at equilibrium?

Question 51 (0.0001 points) Saved (5 marks) Add bonds (double or triple bonds) and lone pairs to the following incomplete structure where required. Include all formal charges where appropriate. Hand write your answer. Select the tickbox when you have completed the question.

Question 54 (0.0001 points) (4 marks) Consider a galvanic cell involving silver (I) and iron (II) and the corresponding Ag and Fe electrodes (use the data in Table 12.1 from the text). Hand draw this galvanic cell include the details below. a) Draw a sketch of the cell (1 marks) b) Clearly identify the anode and cathode (1 mark) c) Write the balanced overall reaction (1 marks) d) Which electrode will lose mass (0.5 mark) e) Outline the direction of the electron flow (0.5 mark) I have hand written my answer

Question 53 (0.0001 points) (4 marks) Consider the unbalanced reaction below, which occurs in an acidic aqueous solution. MnO4 + Fe²+® Fe³+ + Mn²+ a. Identify the half-reactions (oxidation, reduction) (1 marks) b. Balance the reduction equation (1 marks) c. Balance the oxidation equation (1 marks) d. Balance the overall equation (1 marks)

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