1. Titration A review

2. The First Step Balance the Reaction Equation HCl + NaOH  ?? Acid and Base form Salt and Water HCl + NaOH  H 2 O + NaCl Neutralize the Salt Balance the Equation

3. Example: Sulfurous Acid and Iron (III) hydroxide H for Acid, SO 3 2- for Sulfurous Fe 3+ for iron and OH- for hydroxide H 2 SO 3 + Fe(OH) 3

4. Balanced Form H 2 O and Fe and SO 3 Fe 3+ and SO 3 2- Fe 2 (SO 3 ) 3 H 2 SO 3 + Fe(OH) 3  H 2 O + Fe 2 (SO 3 ) 3 3H 2 SO 3 + 2Fe(OH) 3  6 H 2 O + Fe 2 (SO 3 ) 3

5. Find the molar ratio To find the molar ratio you need to look at your balanced equation.

6. Calculating Titration Problems Volume of standard solution times Molarity of the Standard solution Gives you moles of Standard. VxM=moles standard

7. Calculations continued Moles Standard times molar ratio Gives moles of unknown Moles standard x ratio of unknown ratio of standard

8. Calculations Moles of Unknown divided by volume of sample titrated gives Molarity of Unknown. Moles sample/volume of sample=M

9. Shortcut?!?

10. Still need a balanced equation!! ?MaVa=?MbVb How many H’s? How many OH’s? #H’sMaVa=#OH’sMbVb

11. Try one! If you Titrate 10 ml of aluminum hydroxide with 16.3 ml of 0.1 M Sulfuric Acid, What is the concentration of the base?

12. Worksheets