How to Prepare 2M NaOH in 100ml
Preparing a 2M (molarity) solution of sodium hydroxide (NaOH) in 100ml is a common task in chemistry laboratories. Sodium hydroxide is a highly corrosive and reactive chemical, so it is crucial to handle it with extreme caution. This article will guide you through the steps to prepare a 2M NaOH solution in 100ml, ensuring safety and accuracy.
Materials Needed:
Before starting, gather the following materials:
– Sodium hydroxide pellets or powder
– Distilled water
– A 100ml volumetric flask
– A magnetic stirrer (optional)
– A balance (optional)
– Safety goggles
– Gloves
– Lab coat
Step 1: Weigh the Sodium Hydroxide
Using a balance, weigh out 8 grams of sodium hydroxide pellets or powder. The molar mass of NaOH is approximately 40.00 g/mol, so 8 grams of NaOH corresponds to a 0.2 mole quantity. This will result in a 2M solution when dissolved in 100ml of water.
Step 2: Prepare the Solution
Pour 50ml of distilled water into the 100ml volumetric flask. Add the weighed sodium hydroxide to the flask. If you have a magnetic stirrer, use it to mix the solution. The sodium hydroxide will dissolve slowly and may heat up the solution. Allow the solution to cool to room temperature before proceeding.
Step 3: Add More Water
Once the sodium hydroxide has dissolved and the solution has cooled, carefully add more distilled water to the flask until the volume reaches the 100ml mark. Use a dropper or a graduated cylinder to ensure accuracy.
Step 4: Stir and Mix
Stir the solution thoroughly to ensure that the sodium hydroxide is completely dissolved and that the solution is homogeneous. If necessary, use a magnetic stirrer to speed up the process.
Step 5: Safety Precautions
Throughout the preparation process, wear safety goggles, gloves, and a lab coat to protect yourself from the corrosive nature of sodium hydroxide. Avoid contact with skin and eyes, and never inhale the fumes.
Conclusion
By following these steps, you can safely prepare a 2M NaOH solution in 100ml. Always handle sodium hydroxide with caution and adhere to proper safety protocols to ensure a successful and safe experiment.
