Write out the Multiplication and Addition Forms of the Formulas to Relate Kb and Ka

SI Chem 178

Topic: 2nd Half of Ch 16

Leader: Emily

Feb 21, 2013

Review:

Sugg Probs: 76, 83, 86, 90, 97, 100, 114

Write out the multiplication and addition forms of the formulas to relate Kb and Ka:

1.

2.

Use arrows (up or down) to relate the following rows of concepts.

In an HX acid:

____ size of X ______Bond Strength ______Acidity

Which direction is this pattern observed on the PT : VERTICAL LATERAL

In acids with varying central atoms (ex C, N, S)

______polarity ______DEN ______Acidity

This trend is observed LATERALLY VERTICALLY on the PT.

In regards to the pattern of conjugate bases:

______EN of Central atom ______# O’s (or other EN species) ______Acidity

*******Does the rule of the central atom in this case follow the same pattern/rule as that observed with HX? YES NO

______

NEW STUFF!

Define:

Lewis Acid

Lewis Base

Hydrolysis

What is the generalized form of metal solvation/interaction with water? Draw a picture to accompany your equation. Discuss with a partner why this solution will be ACIDIC/BASIC?

BX3 and AlX3 are considered Lewis ACIDS or BASES. ?

Amines generally are considered Lewis ACIDS or BASES ?

In regards to metals, which of the following provide Ka’s that are large enough to be considered acidic? (Circle all that apply.)

+1 Charge Small Transition Metals G1 Metal Cations +2 Charge

Large + charge G2 Metal Cations

Salt solutions have ______and ______dissolved in an aqueous environment, and the interaction would be described as: dipole-dipole/ ion-dipole/ H-bonding/ dispersion forces.

Determination of pH of Salt Solutions: The following cases will either be Acidic/Basic/Neutral:

Cations-

High charge transition metals:

G1 G2 Transition metals:

Conjugate acids of a WEAK base:

Anions-

Conjugate bases of STRONG acids (and list them!!) :

Conjugate bases of WEAK acids:

A positively charged ammonium ion’s acidic hydrogen is attached DIRECTLY or INDIRECTLY to the N? *** Consider how this species had to be formed***

______

16.76 Codeine is a weak base (C18H21NO3) A 5x10^-3M solution has a pH of 9.95. What is the Kb and what is the pKb of this compound?

16.84 Decide whether the following will be acidic/neutral/basic, try to explain why:

AlCl3

NaBr

NaClO

[CH3NH3]NO3

Na2SO3

16.97 On the ELMO