Preparing 0.1 M NaOH in 100 mL
Introduction
Sodium hydroxide (NaOH) is a strong base commonly used in various laboratory and industrial applications. To prepare a solution of NaOH, it is essential to calculate the correct amount of the substance required to achieve a specific molarity. In this article, we will guide you through the process of preparing 0.1 M NaOH in 100 mL.
Molarity Calculation
To prepare 0.1 M NaOH, we need to calculate the amount of NaOH required. Molarity is defined as the number of moles of solute per liter of solution. The molar mass of NaOH is 40.0 g/mol.
Let's calculate the amount of NaOH required:
Molarity (M) = Number of moles of solute / Volume of solution (L)
We want to prepare 0.1 M NaOH in 100 mL, which is equivalent to 0.1 L.
Number of moles of NaOH = Molarity x Volume of solution (L) = 0.1 M x 0.1 L = 0.01 mol
Amount of NaOH required (g) = Number of moles x Molar mass = 0.01 mol x 40.0 g/mol = 0.4 g
Preparation of 0.1 M NaOH
Materials:
- Sodium hydroxide (NaOH) pellets
- Distilled water
- 100 mL volumetric flask
- Balance
Instructions:
- Weigh 0.4 g of NaOH pellets: Use a balance to accurately weigh 0.4 g of NaOH pellets.
- Add NaOH to the volumetric flask: Transfer the weighed NaOH pellets to a 100 mL volumetric flask.
- Add distilled water: Gradually add distilled water to the flask while stirring until the NaOH pellets are completely dissolved.
- Mix and dilute to the mark: Mix the solution well and dilute it to the 100 mL mark with distilled water.
- Stir and label: Stir the solution again and label the flask with the solution's concentration (0.1 M NaOH) and the date of preparation.
Tips and Precautions:
- Handle NaOH with care, as it is a strong base and can cause skin irritation.
- Wear protective gloves, goggles, and a lab coat when handling NaOH.
- Use a fume hood or a well-ventilated area when preparing the solution.
- Store the prepared solution in a cool, dry place.
By following these instructions, you have successfully prepared 0.1 M NaOH in 100 mL. This solution can now be used in various laboratory applications.
