How to Safely Prepare a 0.5 Percent Sodium Hypochlorite Solution- A Step-by-Step Guide

How to Prepare 0.5 Percent Sodium Hypochlorite Solution

Sodium hypochlorite solution, commonly known as bleach, is a versatile chemical used for various purposes, including household cleaning, water purification, and as a disinfectant. One common concentration used is 0.5 percent, which is sufficient for many household applications. In this article, we will guide you through the process of preparing a 0.5 percent sodium hypochlorite solution safely and effectively.

Materials Needed

Before you begin, gather the following materials:

– Sodium hypochlorite (bleach)
– Distilled water
– Measuring cups and spoons
– Plastic container with a tight seal
– Safety equipment (gloves, goggles, and a mask)

Step 1: Safety Precautions

Safety should always be your top priority when handling chemicals. Before you start, ensure you have the necessary safety equipment, such as gloves, goggles, and a mask. Wear these items throughout the preparation process to minimize the risk of exposure to the chemical.

Step 2: Calculate the Required Amount

To prepare a 0.5 percent sodium hypochlorite solution, you will need to calculate the appropriate amount of bleach and water. The formula for a 0.5 percent solution is:

0.5g sodium hypochlorite per 100ml of water

For example, if you want to prepare 1 liter (1000ml) of solution, you will need 5g of sodium hypochlorite and 1000ml of water.

Step 3: Measure the Sodium Hypochlorite

Using a digital scale, measure the required amount of sodium hypochlorite. In our example, this would be 5g. Be precise with your measurements to ensure the correct concentration of the solution.

Step 4: Add Sodium Hypochlorite to the Container

Pour the measured sodium hypochlorite into the plastic container with a tight seal. This container should be large enough to hold the solution and have a spout for easy pouring.

Step 5: Add Water to the Container

Slowly add the measured water to the container with sodium hypochlorite. It is crucial to add the water to the bleach, not the other way around, as this can cause an exothermic reaction that may result in splashing and burns.

Step 6: Stir the Solution

Use a stirring utensil to mix the solution thoroughly. Ensure that the sodium hypochlorite is completely dissolved in the water. This process may take a few minutes.

Step 7: Seal and Label the Container

Once the solution is well-mixed, seal the container tightly to prevent any evaporation or contamination. Label the container with the concentration (0.5 percent sodium hypochlorite) and the date of preparation.

Step 8: Store the Solution Properly

Store the 0.5 percent sodium hypochlorite solution in a cool, dry place away from direct sunlight and out of reach of children and pets. Always keep the container sealed when not in use.

In conclusion, preparing a 0.5 percent sodium hypochlorite solution is a straightforward process that requires precision and safety measures. By following these steps, you can create a practical and effective disinfectant for various household applications.