1. Unit 5: Acid-Base Calculations Lesson 6: Ka and Kb Calculations

2. Ka Calculations
Example: If Ka = 1.8x10-5 for CH3COOH, what is the pH of a M solution of CH3COOH?
Your turn: If pH = 1.70 for a M solution of an unknown weak acid, HA, then what is Ka for HA?
ICE table, assume 0.5-x=0.5 – 25 min

3. Brain Break. Three circles, three related words
Brain Break! Three circles, three related words. Find the missing letter and unscramble the words.
T: jubilant, thrilled, ecstatic

4. Kb Calculations Example: What is the pH of a 0.10 M solution of NaCN?
Your turn: The pOH of a 0.50 M solution of the weak acid HA is What is Kb for A-?
(Hint: Is the solution acidic or basic? This will tell you how to set up your ICE table.)
25 min

5. Homework:
Pg. 152 #74-77
Pg. 153 #84-87
5 min