Wednesday, March 16, 2011

LESSON: 26 Titration


  •        A titration is an experiment technique used to determine of the concentration of an unknown solution

    TERMS AND EQUIPMENT
  •   Buret: contains the known solution. Used to measure how much is added.
  •   Stopcock: Valve used to control the flow of solution from the buret
  •   Pipet: used to accurately measure the volume of unknown solution
  •   Erlenmeyer flask: Container for unknown solution.
  •  Indicator: used to identify the end point of the titration
  •   Stock Solution: Known solution
Pipet


Example: Mike the mighty chemist wants to determine the concentration of a Sodium Hydroxide sample so he does a titration with HCl. He gathers the follow data. Use the information to determine [NaOH].  
NaOH samples= 25.00mL          [HCl]= 0.85M

Average Value = 11.75 mL

NaOH + HCl® HOH + NaCl
0.85 mol x 0.01175L x 1 = 0.00998 = 0.0010 mol
       L                               1

0.00998 mol x   1       = 0.3995 = 0.40 M
                        0.025        


~Kelly

posted by chemistry11 @ 5:08 PM

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