Chapter 2.2, Problem 4P

Complete the equation for the reaction between each Lewis acid-base pair. In each equation, label which starting material is the Lewis acid and which is the Lewis base; use curved arrows to show the flow of electrons in each reaction. In doing this problem, it is essential that you show valence electrons for all atoms participating in each reaction. (a) (b) (c) (d)

Predict the position of equilibrium for this acid-base reaction.

The following are equivalent ways of asking about the acidity of an H atom: • What is the most acidic H on the molecule? • Which H is associated with the published pKa value? • Which H on the molecule is easiest to remove? • Which H on the molecule takes the least energy to remove? • Which bond to an H is most polarized? • For which H atom is removal least uphill in energy? • Which bond to an H atom, when broken, results in the lowest PE conjugate base? We will often find the last of these questions is easiest to answer. To do this, find all the different Hatoms on the molecule, and draw all possible conjugate bases.Only the lowest-energy one is the “real” conjugate base. Identify this structure, and you have found the most acidic H. Use this strategy to find the most acidic H on each of the following molecules. Note: Each structure hasat least three different kinds of H’s, so draw at least three unique conjugate bases for each.

Several acids and their respective equilibrium constants are: Which is the strongest acid? Which is the weakest acid? Which acid has the weakest conjugate base? Which acid has the strongest conjugate base?

A very strong base can remove a proton from methylamine:

When a proton becomes bonded to diethyl ether, by way of one of the unshared electron pairs on the oxygen atom, the result is In this structure the oxygen atom owns one electron from each of ____ shared pairs and two electrons from ____ unshared pair. The total number of electrons that belong to oxygen is ____. The formal charge on oxygen is ____. The correct Lewis structure for the conjugate acid of diethyl ether is ___________________________

Mark each of the following statements True or False: a. The conjugate base of a strong acid is always a weak base. b. The conjugate acid of a strong base is always a weak acid. c. The stronger the acid, the weaker its conjugate base, and vice versa.

Label the Lewis acid and base. Use curved arrow notation to show the movement of electron pairs.

Consider the reaction below: [1] Draw the products of the Bronsted-Lowry acid/base reaction [2] Use curved arrows to show the movement of electrons to form the products (draw in missing lone pairs of electrons if they are involved) [3] Label the acid, base, conjugate acid, conjugate base H -N' your answer on paper and submit a picture of your work here. If that does not work, submit your work to the dropbox labeled (Quiz 3 dropbox) after you have completed the rest of the quiz. Write