Materials:
- Concentrated sulfuric acid (H2SO4) with a known concentration (e.g., 18 M or 98%)
- Distilled or deionized water
- Safety goggles
- Gloves
- Apron
- Glass stirring rod or pipette
- Graduated cylinder or beaker
- Erlenmeyer flask or glass container for the dilute acid
Procedure:
1. Safety First:
- Wear gloves, an apron, and safety goggles to protect yourself from splashes and fumes.
2. Calculate the Required Volume:
- Determine the desired concentration of the dilute sulfuric acid you need for your experiment.
- Use the formula: M1 * V1 = M2 * V2, where M1 is the concentration of the concentrated acid, V1 is the volume of the concentrated acid needed, M2 is the desired concentration of the dilute acid, and V2 is the final volume of the dilute acid.
3. Measure the Concentrated Acid:
- Using a graduated cylinder or pipette, carefully measure the calculated volume of concentrated sulfuric acid. Handle the concentrated acid cautiously, avoiding contact with skin and clothing.
4. Add Acid to Water:
- Never add water to concentrated acid, as this can cause a violent reaction. Instead, slowly add the concentrated acid to a larger volume of distilled or deionized water in an Erlenmeyer flask or glass container.
5. Stirring:
- Gently stir the mixture with a glass stirring rod or pipette to ensure uniform mixing. Be cautious not to splash the acid solution.
6. Cool Down:
- The dilution process may generate heat, so allow the solution to cool down for a few minutes.
7. Label the Container:
- Clearly label the container with the concentration of the dilute sulfuric acid, the date it was prepared, and any other relevant information.
Remember that sulfuric acid is highly corrosive, so it's essential to follow these steps with caution and accuracy. If you have any doubts or concerns, consult with a laboratory instructor or supervisor.
