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Acid Base Titration Lab Essay

746 words - 3 pages

Introduction:

Acid-Base titration labs are often done to determine the amount or concentration of an acid or base in a substance. This is done through adding a base to an acid or and acid to a base. The analyte also known as the titrand is the solution with the unknown molarity. The reagent also known as the titrant is the solution with the known amount of molarity. The reagent reacts with the analyte to obtain the information. In a titration lab the analyte is first prepared by dissolving the studied substance into a solution. A small amount of indicator is then added to a flask along with the titrand. Next the titrant is placed into a burette and is slowly added to the analyte and ...view middle of the document...

Dry beaker with paper towel.
2. Place 0.2M HCl in 50 ml beaker. Rinse the burette with acid. Fill the burette to 0 ml with HCl.
3. Using a pipette at the front of the room, transfer 25 ml of 0.2M NaOH into 10 ml beaker.
4. Add 5 drops of phenolphthalein in to NaOH
5. Rinse calibrate a pH meter
6. Measure the pH of NaOH. The tip of the pH meter should be submerged for thr entire lab
7. Carefully add the volume of HCl indicated in the chart.
8. Mix the solution gently with the tip of the pH meter. Measure and record the pH.
9. Continue adding acid and measuring pH as indicated in the chart below
10. Rinse equipment well with tap water. Extra solutions can be flashed down drain, wipe off your lab bench.

Observation:

Questions:

1) Table

2) Titration: A technique used in labs to determine the concentration of unknown solution by adding a solution of known concentration.

Endpoint: The endpoint in the point at which the indicator changes color in a
colorimetric titration

Equivalence point: refers to the point in a titration procedure where the
amounts of titrant and material being titrated are chemically equivalent
3) It...

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