Acids and Bases
pH
Dissociation constants
Random
100

What's the conjugated base of ammonium?

Conj. base = NH3

Conj. acid = NH3+

NH3 ⇌ NH4+



100

What's the Kw value at 25 °C.

1x10-14

100

Write the Ka expression for acetic acid reacting with water. 

CH3COOH + H2O ⇌ CH3COO- + H3O+

Ka = [CH3COO-][H3O+] / [CH3COOH]


100
The popular phrase "Are you taking notes?" is by _____.

Dr. Becvar 

200

Hydrochloric acid reacts with water. 

Draw the Lewis structures and use the curved arrow notation to indicate the transfer of electrons, and identify which is the Lewis acid and base. 

HCl + H2O ⇌ Cl- + H3O+


HCl = Lewis acid, e- acceptor

H2O = Lewis base, e- donor

Cl- = Lewis base, e- donor

H3O+= Lewis acid, e- acceptor

200

Find the pH of 1x10-3 M HCl solution. 


pH = -log[H+]

pH = -log[1x10-3 M]

pH = 3.0

200

Write the Kb expression for ammonia reacting with water.

Kb = [NH4+][OH-] / [NH3]

200

Is Austin from Austin, Tx?

No

300

Identify the conjugate base of HPO42- in the reaction.

HCO3- + HPO42-  ⇌ H2CO3 + PO43-



PO4-3 


300

Determine the pH of 0.020 M of Ba(OH)2

pOH = -log(0.040)

pH = 14 - 1.40

pH = 12.6

300

The smaller the pKa or pKb, the ____ the acid or base. 

stronger

300

Fun fact. Michel was born in: 

a) Guadalajara

b) Monterrey

c) Tijuana

Tijuana

400
List all the strong bases. 
LiOH 

NaOH 

KOH 

RbOH 

CsOH 

Sr(OH)2

Ba(OH)2

400

Calculate the hydronium ion concentration in pOH = 12 of NaOH solution. 


pOH = 12

pH = 14 - 12 = 2 

pH = pH3O+ = 2

[H3O+] = 10- pH

[H3O+] = 0.01 M

400

T/F. A big pKa value and big Ka value means a weak acid. 

False. 

↑Ka = ↓pKa

400

Give the capitals of four Latin American countries.

  1. Argentina: Buenos Aires
  2. Bolivia: Sucre
  3. Brazil: Brasilia
  4. Chile: Santiago de Chile
  5. Colombia: Bogotá
  6. Costa Rica: San José
  7. Cuba: Havana
  8. Ecuador: Quito
  9. El Salvador: San Salvador
  10. Guatemala: Guatemala City
  11. Haiti: Port-au-Prince
  12. Honduras: Tegucigalpa
  13. Mexico: Mexico City
  14. Nicaragua: Managua
  15. Panama: Panama City
  16. Paraguay: Asunción
  17. Perú: Lima
  18. Dominican Republic: Santo Domingo
  19. Uruguay: Montevideo
  20. Venezuela: Caracas
500
List all the strong acids. 

C -- HCl

S -- H2SO4

I -- HI

N -- HNO3

C -- HClO3, HClO4

B -- HBr

500

Lucky you. Draw the Lewis structure of water and determine if it is an organic or inorganic molecule. 


Inorganic molecule. 

Organic molecules contain C, H, O, N. 

500

Find the pH and pOH of a 1.5 M aqueous pyridine solution. Kb = 1.7x10-9.

C5H5N(aq) + H2O(aq) ⇌ C5H5NH+(aq) + OH-(aq)

pH = 9.7 

pOH = 4.3

500

What's Paola's favorite artist?

Taylor Swift 👸

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