u2: acid-base dissociation

Question 1

strong acids/bases

Answer 1

dissociate completely in water to form ions

Question 2

weak acids/bases

Answer 2

dissociate slightly in water to form ions

Question 3

polyprotic vs monoprotic acids

Answer 3

• poly: many protons ionize from acid (H2SO4)
• mono: one proton ionizes from acid (HCl)

Question 4

percent ionization

Answer 4

p = [H30]/[HA] x 100%

Question 5

ionization of strong acids

Answer 5

we assume 100%

Question 6

ionization of weak acids

Answer 6

most less than 50%

Question 7

how does p vary based on concentration

Answer 7

• increase concentration of HA = increase p
• bc of le chatelier

Question 8

Ka for weak acids

Answer 8

• less than 1
• [H3O] is small, so pH is 2-7

Question 9

Ka for weak bases

Answer 9

• less than 1
• [OH] is small, so pH is 7-12

Question 10

eqn with Ka, Kb, and Kw

Answer 10

Kw = KaKb