Sodium Metabisulfite Solution Preparation

To prepare a sodium metabisulfite solution, follow these steps:

1. Calculate the desired concentration of the solution. For example, if you want a 1% solution, dissolve 1 gram of sodium metabisulfite in 100 mL of water.

2. Measure out the appropriate amount of sodium metabisulfite using a balance.

3. Add the sodium metabisulfite to a clean and dry container, such as a beaker or flask.

4. Add the required volume of water slowly to the container, while stirring continuously to dissolve the sodium metabisulfite completely.

5. Once all the sodium metabisulfite has dissolved, top up the solution with additional water to the desired final volume.

6. Mix the solution thoroughly to ensure that the concentration is uniform throughout.

7. Finally, label the container with the concentration, date of preparation, and any other relevant information.

Note: Sodium metabisulfite is a strong reducing agent, so care should be taken when handling it. Protective equipment such as gloves and goggles should be worn. Additionally, the solution should be prepared in a well-ventilated area due to the formation of sulfur dioxide gas during dissolution.