how do you prepare 3% hydrogen peroxide from 30%
Dilute it by 10.
For example, if you wish to make up a 100 mL solution, then take 10 mL of the 30% stuff and place it in a 100 mL volumetric flask. Add distilled water to the mark on the flask, mix thoroughly, stopper, label.
To prepare a 3% hydrogen peroxide solution from a 30% hydrogen peroxide solution, you will need to dilute the 30% solution with distilled water. Here are the step-by-step instructions:
1. Obtain a container suitable for holding the desired amount of the final solution.
2. Put on protective gloves and safety goggles to ensure your safety while handling the hydrogen peroxide.
3. Calculate the volume of the 30% hydrogen peroxide solution and the distilled water needed to achieve a 3% solution. You can use the following formula:
V1 x C1 = V2 x C2
V1 = volume of the 30% hydrogen peroxide solution
C1 = concentration of the 30% hydrogen peroxide solution (0.30)
V2 = volume of the final solution
C2 = desired concentration (0.03, or 3%)
For example, if you want to prepare 100 mL of a 3% solution:
V1 x 0.30 = 100 mL x 0.03
V1 = (100 mL x 0.03) / 0.30
V1 = 10 mL
So, you will need 10 mL of the 30% solution and 90 mL of distilled water to prepare 100 mL of a 3% hydrogen peroxide solution.
4. Measure the required volume of the 30% hydrogen peroxide solution using a graduated cylinder or another suitable measuring device.
5. Pour the measured volume of the 30% solution into the container.
6. Measure the remaining volume of distilled water needed (in this example, 90 mL) using a separate measuring device.
7. Slowly add the distilled water to the container containing the 30% hydrogen peroxide solution. It is crucial to add the water to the peroxide and not the other way around to avoid a potentially dangerous reaction.
8. Gently mix the solution to ensure proper dilution.
9. The resulting solution is now a 3% hydrogen peroxide solution.
Remember to label the container with the appropriate concentration and always store hydrogen peroxide solutions in a secure location away from heat, light, and flammable materials.
To prepare a 3% hydrogen peroxide solution from a 30% solution, you will need to dilute the 30% solution with a suitable amount of sterile water. Here's a step-by-step guide on how to do it:
1. Wear appropriate protective equipment, such as gloves and goggles, to ensure your safety when handling hydrogen peroxide.
2. Calculate the amount of 30% hydrogen peroxide solution needed to achieve a 3% concentration. To do this, you can use the following formula:
Volume of 30% solution * (desired concentration / starting concentration) = Volume of 3% solution
Let's assume you want to prepare 100 mL of 3% hydrogen peroxide solution. Plug in the values:
Volume of 30% solution * (0.03 / 0.30) = 100 mL
Solve for the volume of the 30% solution:
Volume of 30% solution = (100 mL * 0.30) / 0.03 = 1000 mL
So, you will need 1000 mL (or 1 liter) of 30% hydrogen peroxide solution.
3. Take a clean container that can handle the volume of the solution. It's preferable to use a graduated cylinder or a beaker with clear markings for accurate measurements.
4. Carefully pour the calculated volume (1000 mL or 1 liter) of 30% hydrogen peroxide solution into the container.
5. Add distilled or sterile water to the container to make up the remaining volume. In this case, you will add enough water to reach a total volume of 1 liter.
6. Gently stir the solution to ensure proper mixing. Avoid splashing or agitating it too vigorously to prevent any potential chemical reactions.
7. Keep the solution tightly sealed in a labeled and clearly marked container. It is advisable to store it in a cool, dry place, away from sunlight or heat sources.
It's important to note that hydrogen peroxide solutions can be hazardous, so exercise caution when handling, storing, and disposing of them. Ensure you are following proper safety protocols and consult any relevant guidelines or regulations before performing any chemistry procedures.