Materials required:
- Concentrated HCl (typically 37% or 12 M)
- Distilled or deionized water
- Graduated cylinder or volumetric flask
- Safety goggles
- Gloves
- Lab coat or apron
Procedure:
1. Calculate the volume of concentrated HCl needed:
Determine the desired concentration of the HCl solution you want to prepare and the volume you require. Use the formula:
```
Volume of concentrated HCl (mL) = desired HCl concentration (M) * desired solution volume (mL) / concentrated HCl concentration (12 M)
```
For example: If you want to prepare 500 mL of 3 M HCl solution:
```
Volume of concentrated HCl (mL) = 3 M * 500 mL / 12 M
Volume of concentrated HCl (mL) = 125 mL
```
2. Prepare the glassware:
Thoroughly rinse the graduated cylinder or volumetric flask with distilled water to remove any impurities.
3. Wear safety gear:
Put on safety goggles, gloves, and a lab coat or apron to protect yourself from any splashes or fumes.
4. Dilute the concentrated HCl:
- Slowly add the calculated volume of concentrated HCl to the graduated cylinder or volumetric flask. Do not add water to the concentrated HCl directly.
- Swirl the container carefully to mix the acid and water.
- Be cautious as the dilution may release fumes.
5. Bring the solution to the desired volume:
- Use distilled water to carefully bring the solution up to the desired volume indicated by the markings on the container.
- Swirl the solution again to ensure uniform mixing.
6. Store the HCl solution:
Pour the prepared HCl solution into a suitable storage container, label it clearly with concentration, date, and safety hazards. Store the solution in a designated, secure area.
Note: Always add concentrated HCl to water, and never add water to concentrated HCl. Rapid addition of water to concentrated HCl can cause a violent reaction with the potential for dangerous splashing or boiling.
Remember to follow all safety guidelines and precautions when working with hydrochloric acid.
