Describe the preparation of sodium hydroxide in the school laboratory.
To prepare sodium hydroxide (NaOH) in a school laboratory, the following steps can be followed:
1. Safety first: Before starting any experiment, ensure that you have proper safety attire, including goggles, lab coat, and gloves, to protect yourself from any potential hazards.
2. Measure appropriate quantities: Determine the desired amount of sodium hydroxide you wish to prepare. This will depend on the purpose of the experiment or the specific instructions provided.
3. Dissolve sodium hydroxide: Sodium hydroxide is highly soluble in water. Take a clean beaker or glass container and add distilled water to it. If the instructions specify a certain volume or concentration, ensure you measure the required amount of water using a graduated cylinder or a suitable measuring device.
4. Gradually add sodium hydroxide: While stirring continuously, slowly add the solid sodium hydroxide to the water. Do not pour water onto solid sodium hydroxide, as it can cause a violent reaction. Instead, add the solid to the water while stirring gently. This will prevent the mixture from splashing and ensure an even dissolution.
5. Continue stirring: Keep stirring the mixture until all the sodium hydroxide has dissolved in the water. This may take a few minutes. Avoid inhaling the fumes released during the dissolution process, as they can be irritating.
6. Safety precautions while handling: Sodium hydroxide is a strong base and can cause burns. Handle it with care and avoid any contact with your skin or eyes. If any spillage occurs, immediately rinse with plenty of water.
7. Label and store: Once the sodium hydroxide solution is prepared, transfer it into a clean, labeled container for future use. Make sure to properly label the container with the name and concentration of the solution, as well as the date of preparation.
Remember, it is always essential to follow the specific instructions given by your teacher or lab manual when preparing chemicals in the school laboratory. Additionally, consult your teacher or a qualified professional to ensure proper handling and disposal of any chemicals used.