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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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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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