NaOH Concentration Determination

Flashcards for reviewing the steps and concepts involved in determining NaOH concentration through titration.

Goal of the Practicum

The determination of the concentration of sodium hydroxide by titration with a standard 0.10 mol/L HCl solution.

Skills Acquired

Learning to handle volumetric equipment: volumetric flask, pipette, pipette pump, burette.

Research Problem

To determine the concentration of sodium hydroxide by titration with a standard 0.10 mol/L HCl solution.

Information Gathering

Principle of titration and acid-base indicators.

Materials

Burette, stand, burette clamp, 250 mL Erlenmeyer flask, 100 mL graduated cylinder, 10 mL pipette, funnel, white card background.

Reagents

Phenolphthalein, distilled water, NaOH solution, HCl solution 0.10 mol/L.

Step 1 of the Procedure

Transfer 10 mL of NaOH solution into an Erlenmeyer flask, add a few drops of phenolphthalein, and homogenize.

Step 2 of the Procedure

Fill the burette with the 0.10 mol/L HCl solution.

Step 4 of the Procedure

Titrate until colorless.

Step 6 of the Procedure

Repeat the titration three times and calculate the average added volume.

Calculation 1

Calculate the concentration of NaOH in the solution, expressed in mol/L.

Calculation 2

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