1. Acid – Base Titrations

2. Titration of HCl with NaOH

3. 0.00 mL Titrant Added
Titration Reaction
H+ OH- H2O
end = M = 0 M lots
Equilibrium Reaction
H2O H+ OH-
Initial lots
Change - x + x + x
Equilibrium lots ~ x
[H+] = M
Concentration
pH = - log(0.1000) = 1.00

4. 25.00 mL Titrant Added (Equivalence Point)
Titration Reaction
H+ OH- H2O
start (0.1000M)( L) (0.1000M)( L)
= mol = mol = 0 mol
end 0 mol 0 mol lots
= 0 M = 0 M lots
Equilibrium Reaction
H2O H+ OH-
Initial lots 0 0
Change - x + x + x
Equilibrium lots x x
= x2
x = [H+] = M
Concentration
pH = - log(10-7) = 7.00

5. 50.00 mL Titrant Added
Titration Reaction
H+ OH- H2O
start (0.1000M)( L) (0.1000M)( L)
= mol = mol = 0 mol
end 0 mol mol mol
mol/ L
= 0 M = M lots
Equilibrium Reaction
H2O H+ OH-
Initial lots
Change - x + x + x
Equilibrium lots x ~
[OH-] = M
Concentration
pOH = - log( ) = or pH = =

6. Concentration Effects
0.1 M HCl titrated with 0.1 M NaOH
0.001 M HCl titrated with M NaOH
Methyl Red Indicator
Thymol Blue Indicator
Phenolphthalein Indicator

7. Strong Acid vs. Strong Base Titration

8. Titration of HAc with NaOH

9. 0.00 mL Titrant Added
Titration Reaction
HAc OH- Ac- H2O
end = M = 0 M = 0M lots
Equilibrium Reaction
HAc H+ Ac-
Initial
Change - x + x + x
Equilibrium ~ x x
1.75 x = x2 /
x = [H+] = M
Concentration
pH = - log( ) = 2.88

10. 12.50 mL Titrant Added
Titration Reaction
HAc OH- Ac- H2O
start (0.1000M)( L) (0.1000M)( L)
= mol = mol 0 0
end mol 0 mol
mol/ L
= M = 0 M = M lots
Equilibrium Reaction
HAc H+ Ac-
Initial
pH = log( / ) = 4.76
Concentration
pH = 4.76

11. 25.00 mL Titrant Added
Titration Reaction
HAc OH- Ac- H2O
start (0.1000M)( L) (0.1000M)( L)
= mol = mol 0 0
end 0 mol 0 mol /
= 0 M = 0 M = lots
Equilibrium Reaction
Ac- H2O HAc OH-
Initial lots 0 0
Change - x - x + x + x
Equilibrium ~ lots x x
Kb = / (1.75 x 10-5) = x = x2 /
x = [OH-] = x M
Concentration
pOH = - log(5.34 x 10-6) = or pH = = 8.73

12. 50.00 mL Titrant Added
Titration Reaction
HAc OH- Ac- H2O
start (0.1000M)( L) (0.1000M)( L)
= mol = mol 0 0
end 0 mol mol mol
mol/ L
= 0 M = M = M lots
Equilibrium Reaction
Ac- H2O HAc OH-
Initial lots
Change - x - x + x + x
Equilibrium ~ lots x ~
[OH-] = M
Concentration
pOH = - log( ) = or pH = =

13. Methyl Red
Thymol Blue
Phenolphthalein

14. Effect of Concentration and Strength

15. Weak Acid vs. Weak Base Titration

16. Acid-Base Indicators Phenolphthalein Basic Form = Pink
Acidic Form = Colorless

17. Bromothymol Blue

18. 0.1 M HAc titrated with 0.1 M NaOH
Methyl Red Indicator
Phenolphthalein Indicator