Use the information in the pK table to rank the molecules in order of decreasing basicity. For exam and "2" for the next strongest base and so on. CH3NH₂ H™ HSO4 HS Molecules (Choose one) (Choose one) (Choose one) (Choose one) X Ś ▼ CH4 48 NH3 H₂ CH,NH, H₂O 15.7 CH₂OH 15.5 38 36 33 pk table CH,NH CH, SH HCN + NH H₂S CH,CO,H 10.6 10.4 9.4 9.2 7.00 4.76

Use the information in the pK table to rank the molecules in order of decreasing basicity. For exam and "2" for the next strongest base and so on. CH3NH₂ H™ HSO4 HS Molecules (Choose one) (Choose one) (Choose one) (Choose one) X Ś ▼ CH4 48 NH3 H₂ CH,NH, H₂O 15.7 CH₂OH 15.5 38 36 33 pk table CH,NH CH, SH HCN + NH H₂S CH,CO,H 10.6 10.4 9.4 9.2 7.00 4.76

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter4: Polar Bonds, Polar Reactions

Section: Chapter Questions

Problem 28CTQ: For the previous four questions, label each molecule that appears in the question or your answer...

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For the previous four questions, label each molecule that appears in the question or your answer asstrong acid, strong base, weak acid, or weak base.
For each molecule below, draw the conjugate acid or conjugate base or both if the molecule hasboth a conjugate acid and a conjugate base (e.g., water).
A very strong base can remove a proton from methylamine:
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)
(E) Label each of the following as strong acid, strong base, or neither.
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?
Answer true or false to the following statements about the mechanism of acid-base reactions. (a) The acid and base must encounter each other by a collision in order for the proton to transfer. (b) All collisions between acids and bases result in proton transfer. (c) During an acid-base reaction the lone pair on the base fills the A-H antibonding sigma orbital.
As we shall see in Chapter 19, hydrogens on a carbon adjacent to a carbonyl group are far more acidic than those not adjacent to a carbonyl group. The anion derived from acetone, for example, is more stable than is the anion derived from ethane. Account for the greater stability of the anion from acetone.
Which has the larger numerical value? (a) The pKa of a strong acid or the pKa of a weak acid (b) The Ka of a strong acid or the Ka of a weak acid