Bronsted Lowry Model + Dissociation Constants

Question 1

Buffer

Answer 1

A solution that resists a change in pH when a small amount of an acid or base is added. Consists of conjugate pairs

Question 2

Conjugate acid-base pairs

Answer 2

acid->conjugate base (acid- H+ ion)
base-> conjugate acid (base+ H+ ion)

Question 3

Amphiprotic Substances

Answer 3

Can be both acid or base as it can donate or accept a proton (e.g. water, amino acids)

Question 4

Le Chatlier’s Principle

Answer 4

Used to predict change. Position of equilibrium will shift if a change is posed on the system at equilibrium to reduce the change.

Question 5

Ka

Answer 5

Acid dissociation constant. Higher Ka= stronger dissociation and vice versa

Question 6

Kb

Answer 6

Base dissociation constant. Higher Kb= stronger dissociation and versa

Question 7

Ka and Kb relation

Answer 7

Large Ka value= stronger acid and weak/small Kb value
Vice versa

Question 8

pKa and pKb

Answer 8

Used to compare the strength of the acid/base during dissociation. pKa=-logKa, pKb=-logKb