How to Prepare a 0.1 M Sodium Hydroxide (NaOH) Solution for Optimal pH Control

Materials Required

Sodium hydroxide solid Distilled water A balance A volumetric flask or graduated cylinder (1 L) A stirring rod or magnetic stirrer

Calculation

To prepare a 0.1 M sodium hydroxide (NaOH) solution, the first step is to calculate the amount of NaOH needed. The molar mass of NaOH is approximately 40.00 g/mol. For a 0.1 M solution, you need 0.1 moles of NaOH per liter of solution. Therefore, the mass of NaOH needed is calculated as follows:

Mass Molarity times; Molar Mass times; Volume (L)

Mass 0.1 mol/L times; 40.00 g/mol times; 1 L 4.00 g

Procedure

Weigh the NaOH

Use a balance to accurately weigh out 4.00 grams of solid NaOH.

Dissolve the NaOH

Add the 4.00 grams of NaOH to a volumetric flask or a beaker containing about 800 mL of distilled water. Stir the solution gently until the NaOH is completely dissolved.

Make Up to the Final Volume

After the NaOH has dissolved, transfer the solution to a 1 L volumetric flask if you used a beaker. Then, add distilled water until the total volume reaches 1 L.

Mix Thoroughly

Ensure the solution is well mixed. If using a volumetric flask, invert it several times to ensure homogeneity.

Safety Precautions

Sodium hydroxide is caustic and can cause burns. Always wear gloves and safety goggles when handling NaOH. Handle the solution in a well-ventilated area.

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Materials Required for pH Control Calculation of Molar Concentration Step-by-Step Procedure for Solution Preparation

Now you have a 0.1 M NaOH solution ready for use in various applications, such as pH control or buffer preparation.