Titrtation Lab

Hello...

Okay, so what we did today (and also learned) is the Titration Reaction (Lab. or Experiment...)

Titrations are procedures which are usually used to determine the unknown concentrations of substances . It is a common laboratory method of quantitative/chemical analysis that can be used to determine the unknown concentration of a known reactant. Because volume measurements play a key role in titration, it is also known as volumetric analysis. A reagent, called the titrant, of known concentration (a standard solution) and volume is used to react with a solution of the analyte, whose concentration is not known in advance. Using a calibrated burette to add the titrant, it is possible to determine the exact amount that has been consumed when the endpoint is reached. The endpoint is the point at which the titration is complete, as determined by an indicator.

THE EXPERIMENT
Materials: 1-50mL beaker
3 Micropipettes
Phenolphthalein Indicator
10 mL Graduated Cylinder
Distilled Water
0.1 mol/L NaOH
0.1 mol/L H2SO4


Procedures:

1.) Using the Graduated Cylinder and a micropipette, count and record the number of dropd required to obtain 1.0 mL of distilled water. REPEAT the process 3 TIMES.

2.) Add 5 mL of Distilled water, and 1 drop of Phenolphthalein Indicator to the 50 mL beaker.

3.) Using a 2nd micropipette, add 20 drops of 0.1 mol/L H2SO4 to the beaker.

4.) Using the 3rd micropipette, add the 0.1 ml/L NaOH drop by drop until the addition of one drop permanently changes the colour of the solution. Recprd the number of drops required to reach the endpoint of tartration.

5.) Rinse the contents of the beaker. "Repeat Steps 2-4 a total of 3 times!!!!"

The Next 'Blogger' is M:-)