NaOH Titration Vocabulary

Onderzoekspracticum: Bepaling van NaOH-concentratie mbv Titratie

Attitudes

• Veiligheid:
  • Labcoat should be worn and closed.
  • Safety glasses should be worn.
  • Consideration for the safety of fellow students.
  • Awareness of P and H phrases.
• Order and Cleanliness:
  • Glassware cleaned.
  • Hair in order.
  • Bag placement.
  • Table and sink cleaned.
  • Waste sorted correctly.
  • Everything returned to its proper place.
• Work Ethic:
  • Proper use of materials.
  • Smooth collaboration.
  • No talking with other groups.
• Conclusion: Reflection on the experiment.

Doel van het Practicum (Objective of the Practicum)

• Determine the concentration of sodium hydroxide (NaOH) through titration with a standardized hydrochloric acid (HCl) solution of 0.10 mol/L.
• Learn to handle volumetric equipment: volumetric flask, pipette, pipette pump, burette.

Oriënteren - Onderzoeksvraag (Orientation - Research Question)

• Onderzoeksprobleem (Research Problem): Determine the concentration of sodium hydroxide by titration with a standardized HCl solution of 0.10 mol/L. The NaOH solution is provided.

Voorbereiden (Preparation)

A - Informatie verzamelen = vooronderzoek (Gathering Information = Preliminary Research)

• Principle of titration and acid-base indicators.

B - Benodigdheden (Materials Required)

• Materiaal (Materials):
  • Burette.
  • Retort stand.
  • Burette clamp.
  • 250 mL Erlenmeyer flask.
  • 100 mL graduated cylinder.
  • 10 mL pipette.
  • Funnel.
  • White card for background.
• Stoffen (Chemicals):
  • Phenolphthalein.
  • Distilled water.
  • NaOH solution (H315-319 P280.1+3-305+351+338).
  • HCl solution 0.10 mol/L (no H- or P-phrases indicated).

Uitvoeren (Execution)

Werkwijze (Procedure)

• Using a pipette, transfer exactly 10 mL of the NaOH solution into an Erlenmeyer flask, add a few drops of phenolphthalein, and homogenize (mix).
• Fill the burette with the 0.10 mol/L HCl solution.
• Record the initial reading of the HCl solution in the burette.
• Titrate until the solution becomes colorless.
• Record the final reading of the HCl solution in the burette.
• Perform the titration at least three times and calculate the average volume of HCl added.
• Let the burette drain. Rinse by letting a full burette of tap water drain through.
• Proefopstelling (Experimental setup; Create a drawing and label the components)

Meetgegevens (Measurements)

Berekeningen (Calculations)

• Calculate the concentration of NaOH in the solution, expressed in mol/L.
• Calculate the concentration of NaOH in the solution, expressed in m/V%.

Rapporteren - Reflecteren (Reporting - Reflection)

Evalueren uitvoering (Evaluating Execution)

• Does the calculated concentration match the value on the label? If not, what could be the reasons for the discrepancy? Possible errors or deviations during the experiment.