Preparation of 2% Sodium Metabisulfite Solution
To prepare a 2% sodium metabisulfite solution, you need 2 grams of sodium metabisulfite for every 100 milliliters (mL) of solution, or 20 grams for every 1 liter of solution.
Materials Required
- Sodium metabisulfite powder
- Distilled water
- Weighing balance
- Beaker or flask
- Stirring rod or magnetic stirrer
- Measuring cylinder or volumetric flask
Procedure
- Step 1: Weigh 2 grams of sodium metabisulfite for every 100 mL of solution you want to prepare. For 1 liter, weigh 20 grams.
- Step 2: Add the sodium metabisulfite powder to a beaker or flask.
- Step 3: Add distilled water to the beaker, but use slightly less than the final desired volume (e.g., 80-90 mL for 100 mL solution, or 800-900 mL for 1 liter solution).
- Step 4: Stir the solution thoroughly until the sodium metabisulfite is completely dissolved.
- Step 5: Transfer the solution to a graduated cylinder or volumetric flask and add more distilled water to reach the final desired volume (e.g., up to 100 mL or 1 liter).
- Step 6: Mix well to ensure homogeneity.
- Step 7: Store the solution in a tightly sealed container, properly labeled.
Safety Notes
- Wear appropriate personal protective equipment (gloves, goggles, lab coat).
- Avoid inhaling the powder or vapors - prepare the solution in a well-ventilated area.
