0.1 M Ethanolic Sodium Hydroxide Preparation
Introduction
Sodium hydroxide (NaOH) is a strong base widely used in various laboratory applications, including titration, synthesis, and analytical chemistry. When dissolved in ethanol, sodium hydroxide forms a solution that is commonly used in organic synthesis and analytical reactions. In this article, we will describe the preparation of 0.1 M ethanolic sodium hydroxide solution.
Materials
- Sodium hydroxide pellets (NaOH)
- Ethanol (C2H5OH)
- Distilled water
- Volumetric flask (100 mL)
- Analytical balance
- Stirring rod
- pH paper or pH meter (optional)
Preparation
Step 1: Weighing Sodium Hydroxide
Weigh approximately 0.4 g of sodium hydroxide pellets using an analytical balance. This amount is equivalent to 0.01 mol of NaOH.
Step 2: Dissolving Sodium Hydroxide in Distilled Water
Transfer the weighed sodium hydroxide pellets to a small beaker and add a few milliliters of distilled water. Stir the mixture using a stirring rod until the sodium hydroxide pellets are completely dissolved.
Step 3: Adding Ethanol
Add approximately 80 mL of ethanol to the beaker containing the sodium hydroxide solution. Stir the mixture well to ensure that the sodium hydroxide is fully dissolved.
Step 4: Transferring to Volumetric Flask
Transfer the solution to a 100 mL volumetric flask and add more ethanol to the mark. Stir the solution gently to ensure that it is homogeneous.
Step 5: Final Check
Check the pH of the solution using pH paper or a pH meter to ensure that it is within the desired range (pH 13-14). If necessary, adjust the pH by adding more sodium hydroxide pellets or ethanol.
Storage and Handling
- Store the 0.1 M ethanolic sodium hydroxide solution in a tightly sealed container in a cool, dry place.
- Handle the solution with care, as it can cause skin and eye irritation.
- Wear protective gloves, goggles, and a laboratory coat when handling the solution.
Conclusion
In this article, we have described the preparation of 0.1 M ethanolic sodium hydroxide solution. This solution is commonly used in various laboratory applications, including organic synthesis and analytical reactions. By following the steps outlined above, you can prepare a high-quality solution that meets your laboratory needs.
