Preparation and Standardization of 1 M Sodium Hydroxide Solution (NaOH)

In this experiment, we will focus on the preparation and standardization of a 1 M Sodium Hydroxide solution.

Molarity and How to Prepare 1 M NaOH with Example:

• Molarity is defined as the moles of a solute per liter of a solution 1M NaOH solution means 1 Mole of NaOH dissolves in 1 liter CO, free water (solvent)
• 1Mole of NaOH = Molecular weight of NaOH
• The molecular weight of NaOH = The sum of atomic masses of all atoms in a molecule.

Example for factor calculation for standardization of 1 m NaOH:
Na=23
O=16
H=1
Total= 40 gm.

Reagents Required for Preparation and Standardization of 1 M NaOH:

Method for Preparation of 1 M Sodium Hydroxide Solution:

• The method of preparation for the 1 M Sodium Hydroxide solution involves dissolving 42 g of sodium hydroxide in a sufficient amount of carbon dioxide-free distilled water, resulting in a final volume of 1000 ml.

Next, the method of standardization is as follows:

• Accurately weigh about 2.0 g of potassium hydrogen phthalate, which should have been previously powdered and dried at 120°C for 2 hours.
• Dissolve the potassium hydrogen phthalate in 75 ml of carbon dioxide-free distilled water.
• Add 0.1 ml of phenolphthalein solution.
• Titrate the solution with sodium hydroxide until a permanent pink color is obtained.
• Each milliliter of the 1 M sodium hydroxide solution is equivalent to 0.2042 g of C₈H₅KO₄.

The chemical reaction between potassium hydrogen phthalate+NaOH:

Formula for calculation for the assay is determined as follows:

Assay (%) = (Weight of KHP (g) × 1.0 × Assay of KHP) / (Burette Reading in ml × 0.2042 × 100)

Preparation and standardization of NaOH solution lab report:

To get the final report, Titrate the solution with sodium hydroxide until a permanent pink color is obtained.

This experiment adheres to the guidelines outlined in the “Indian Pharmacopoeia,” ensuring accuracy and reliability in the results.

Related: Preparation and Standardization of 1.0 M Hydrochloric Acid