AP Chemistry Unit 8- Homework Problems Ka and Kb Acid & Base ...

Acid-Base Interactions
Strong-Strong
1. What is the pH when 50 mL of 0.1 M HCl is mixed with 50 mL of 0.1 M NaOH?
2. What is the pH when 250 mL of 0.2 M HNO 3 is mixed with 500 mL of 0.1 M KOH?
3. What is the pH when 100 mL of 0.001 M HBr is mixed with 50 mL of 0.001 M NaOH?
4. What is the pH when 40 mL of 0.01 M HI is mixed with 120 mL of 0.008 M CsOH?
5. What is the pH when 50 mL of 0.0025 M H 2 SO 4 is mixed with 75 mL of 0.0040 M LiOH?
6. What is the pH when 20 mL of 0.00050 M HClO 4 is mixed with 20 mL of 0.00040 M Ba(OH) 2 ?
Strong-Weak
7. What is the pH when 25 mL of 0.25 M HCl is mixed with 25 mL of 0.25 M NH 3 ? (K b = 1.8x10 -5 )?
8. What is the pH when 20 mL of 0.020 M HNO 3 is mixed with 20 mL of 0.030 M C 6 H 5 NH 2 (K b = 4x10 -10 )?
9. What is the pH when 50 mL of 0.040 M NaOH is mixed with 50 mL of 0.040 M HN 3 (K a = 1.9x10 -5 )?
10. What is the pH when 120 mL of 0.0075 M KOH is mixed with 200 mL of 0.0050 M HOCl (K a = 3.5x10 -8 )?
Midpoint
11. What is the pH when 25 mL of 0.050 M HCl is mixed with 50 mL of 0.050 C 5 H 5 N (K b = 1.5x10 -9 )?
12. What is the pH when 40 mL of 0.80 M NaOH is mixed with 80 mL of 0.8 M HNO 2 (K a = 4.5x10 -4 )?
13. What is the pH when 30 mL of 0.006 M HNO 3 is mixed with 30 mL of 0.012 M (CH 3 ) 3 N (K b = 7.4x10 -5 )?
14. What is the pH when 100 mL of 0.0078 M KOH is mixed with 100 mL of 0.0156 M C 6 H 5 CO 2 H (K a = 6.3x10 -5 )
K sp and pH
1. What is the pH of a saturated solution of Mn(OH) 2 K sp = 1.9x10 -13 ?
2. What is the pH of a saturated solution of Ca(OH) 2 K sp = 5.5x10 -5 ?
3. At what pH will a 0.0075 M solution of Mg(OH) 2 begin to form a precipitate (K sp = 5.6x10 -12 )?
4. At what pH will a 0.00042 M solution of Pb(OH) 2 begin to form a precipitate (K sp = 1.4x10 -15 )?