Shanxian Chemical
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How To Prepare 0 2M Hydrogen Peroxide
Method of preparing 0.2M hydrogen peroxide
To prepare a 0.2M hydrogen peroxide solution, first understand the required raw materials and utensils. Hydrogen peroxide reagent is required, which is the foundation of liquid preparation; another measuring device is required, such as a volumetric bottle, a pipette, etc., to measure accurately; also need to stir the utensils to make the solution uniform.
First look at the concentration of hydrogen peroxide reagent. Common commercially available hydrogen peroxide solutions have different concentrations. If the original concentration is known to be $C_1 $, set the volume of the 0.2M solution to be $V_2 $, according to the dilution law $C_1V_1 = C_2V_2 $ ($C_2 $is the target concentration of 0.2M), it can be calculated that the volume of the original hydrogen peroxide solution needs to be taken $V_1 $.
Use the volumetric bottle as the liquid dispensing container. Choose the appropriate size volumetric bottle. If you want to match 500mL 0.2M hydrogen peroxide solution, choose 500mL volumetric bottle. Wash and dry the volumetric bottle first to ensure cleanliness and dryness.
Use a pipette to calculate the $V_1 $, accurately measure the original hydrogen peroxide solution, and slowly inject it into the volumetric bottle. Then, add distilled water to the volumetric bottle. When adding water close to the scale line, use a rubber head dropper to add water dropwise until the concave liquid surface of the solution is tangent to the scale line.
Cover the volume cork tightly, turn it upside down and shake it well, so that the solution is fully mixed. In this way, the 0.2M hydrogen peroxide solution is prepared. The preparation process must be carefully operated to ensure the accurate concentration of the solution.
To prepare a 0.2M hydrogen peroxide solution, first understand the required raw materials and utensils. Hydrogen peroxide reagent is required, which is the foundation of liquid preparation; another measuring device is required, such as a volumetric bottle, a pipette, etc., to measure accurately; also need to stir the utensils to make the solution uniform.
First look at the concentration of hydrogen peroxide reagent. Common commercially available hydrogen peroxide solutions have different concentrations. If the original concentration is known to be $C_1 $, set the volume of the 0.2M solution to be $V_2 $, according to the dilution law $C_1V_1 = C_2V_2 $ ($C_2 $is the target concentration of 0.2M), it can be calculated that the volume of the original hydrogen peroxide solution needs to be taken $V_1 $.
Use the volumetric bottle as the liquid dispensing container. Choose the appropriate size volumetric bottle. If you want to match 500mL 0.2M hydrogen peroxide solution, choose 500mL volumetric bottle. Wash and dry the volumetric bottle first to ensure cleanliness and dryness.
Use a pipette to calculate the $V_1 $, accurately measure the original hydrogen peroxide solution, and slowly inject it into the volumetric bottle. Then, add distilled water to the volumetric bottle. When adding water close to the scale line, use a rubber head dropper to add water dropwise until the concave liquid surface of the solution is tangent to the scale line.
Cover the volume cork tightly, turn it upside down and shake it well, so that the solution is fully mixed. In this way, the 0.2M hydrogen peroxide solution is prepared. The preparation process must be carefully operated to ensure the accurate concentration of the solution.
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