Bronsted Acids And Bases

Question 1

Strong Electrolytes

Answer 1

• are strong acids
• complete dissociation
  HCL -> H+ + Cl-

Question 2

Weak Electrolytes

Answer 2

• Weak Acids
• equilibrium rxn
  HF -> H+ + F-

Question 3

Acidic pH

Answer 3

• Conc. H+ < 7
  H+>OH-

Question 4

Basic Ph

Answer 4

OH- > 7
OH- > H+

Question 5

Ka

Answer 5

• Acid ionization constant of an acid rxn
• larger Ka = greater weak acid strength

Question 6

Large Ka tells me?

Answer 6

Greater strength of weak acid

Question 7

Kw

Answer 7

• Auto-ionization constant of H2O
• in constant dissociation
  1.0x10^-14
  [H+] x [OH-] = Kw

Question 9

Acidic

Answer 9

• [H+] > [OH-]
  -pH < 7

Question 10

Kb

Answer 10

Base ionization constant
Greater Kb = greater weak base strength
Much greater than 1.0x10^-14

Question 11

NH4

Answer 11

Acidic

Question 12

KCN

Answer 12

Basic

Question 13

Fe(NO3)3

Answer 13

Acidic

Question 14

CH3CH2NH3Cl

Answer 14

Acidic

Question 15

CaCl2

Answer 15

Neutral

Question 16

Diprotic and Polyprotic acids

Answer 16

Dissociate in stages
K1>K2>K3

Question 17

Acidic solution @25 C

Answer 17

[OH-] < 1.0x10^-7
[H+] > 1.0x10^-7
pH<7
[H+]> [OH-]

Question 18

Basic Soln @ 25 C

Answer 18

[OH-] > 1.0x10^-7
[H+] < 1.0x10^-7
pH>7
[H+] < [OH-]

Question 19

Buffer

Answer 19

• A soln containing amounts of H+ and OH-
  -Resists changes to pH