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Titration. A review. 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. Example:. Sulfurous Acid and Iron (III) hydroxide H for Acid, SO 3 2- for Sulfurous

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Presentation Transcript
titration

Titration

A review

the first step
The First Step
  • Balance the Reaction Equation
  • HCl + NaOH  ??
  • Acid and Base form Salt and Water
  • HCl + NaOH  H2O + NaCl
  • Neutralize the Salt
  • Balance the Equation
example
Example:
  • Sulfurous Acid and Iron (III) hydroxide
  • H for Acid, SO32- for Sulfurous
  • Fe 3+ for iron and OH- for hydroxide
  • H2SO3 + Fe(OH)3
balanced
Balanced
  • Form H2O and Fe and SO3
  • Fe 3+ andSO32-
  • Fe2(SO3)3
  • H2SO3 + Fe(OH)3  H2O + Fe2(SO3)3
  • 3H2SO3 + 2Fe(OH)3 
  • 6 H2O + Fe2(SO3)3
find the molar ratio
Find the molar ratio
  • To find the molar ratio you need to look at your balanced equation.
calculating titration problems
Calculating Titration Problems
  • Volume of standard solution times
  • Molarity of the Standard solution
  • Gives you moles of Standard.
  • VxM=moles standard
calculations continued
Calculations continued
  • Moles Standard times molar ratio
  • Gives moles of unknown
  • Moles standard x ratio of unknown
  • ratio of standard
calculations
Calculations
  • Moles of Unknown divided by volume of sample titrated gives Molarity of Unknown.
  • Moles sample/volume of sample=M
still need a balanced equation
Still need a balanced equation!!
  • ?MaVa=?MbVb
  • How many H’s?
  • How many OH’s?
  • #H’sMaVa=#OH’sMbVb
try one
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?
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