Topic #5: Procedure

• Preparation of 0.100 M NaOH

  1. Using the formula for molarity, calculate the mass of solid solute needed to prepare 250mL solution.
• Preparation of 0.100 M NaOH

  2. Weigh the calculated mass of solid solute in a clean dry beaker using the analytical balance.
• Preparation of 0.100 M NaOH

  3. Add a small amount of distilled water to dissolve

  the solute and transfer this solution into a 250mL

  volumetric flask.
• Preparation of 0.100 M NaOH

  4. Wash the beaker with small amount of distilled

  water and transfer the washings into the same

  volumetric flask.
• Preparation of 0.100 M NaOH

  5. Adjust the volume by adding more water into the

  volumetric flask up to the mark and stopper the

  flask before shaking well.
• Preparation of 0.100 M NaOH

  6. Transfer the prepared solution into a plastic

  container.
• Preparation of 0.100 M HCI

  1. Calculate the volume of concentrated HCl needed to prepare 250 mL of the required concentration by dilution.
• Preparation of 0.100 M HCI

  2. Using the pipet, transfer the computed volume of

  concentrated acid into a 250mL volumetric flask

  that is half filled with distilled water.
• Preparation of 0.100 M HCI

  3. Rinse the container by adding a small amount of

  water and pour the washings into the flask.
• Preparation of 0.100 M HCI

  4. Adjust the volume by adding water into the

  volumetric flask up to the mark and stopper the

  flask before shaking gently.
• Preparation of 0.100 M HCI

  5.Transfer the prepared solution into a glass

  container.