2mno4 - + 5h2o2 + 6h= 2mn 2+ + 5o2(gás) + 8h2o

You must determine the percentage of hydrogen peroxide (H2O2) in a solution by permangan titration. In an acid solution, the permanganations will oxidize hydrogen peroxide to oxygen gas .........

You must determine the percentage of hydrogen peroxide (H2O2) in a solution by permangant titration. In an acid solution, the permanganations will oxidize hydrogen peroxide to oxygen gas ......... In other contexts, hydrogen peroxide can be reduced ..........

1- Calculate how many milliliters hydrogen peroxide solution you must measure

up in the vibrator to get a standard solution of approx. 20 ml. opposite

this volume of hydrogen peroxide solution to an erlenmeyer flask using

a pipette as accurate as possible

2- add 3-5 mL 3 mL sulfuric acid.

3- titers with standard (0.0200 mol / L) potassium permanagant solution. see attempts

4- Explain the method. What does the reaction equations tell you about

substance proportions in the reactions? Calculate the percentage of

hydrogen peroxide in solution. The bulk density of the solution allows you to equal 1.00 g / mLr



about 0.3% H2O2 (newly purchased)

-3 mol / L H 2 SO 4

- 0.0200 mol / L KMno4, standard solution

-erlenmeyer bottle 240 mL

burette- measuring cylinder, small

stand with city holder

magnet magnet and magnet

wash bottle

-

goggles

It seems that you want to determine the percentage of hydrogen peroxide (H2O2) in a solution using permanganate titration. Here are the steps to perform the experiment:

1. Prepare a standard solution of the hydrogen peroxide that is about 20 mL. To do this, use the given hydrogen peroxide concentration (approx. 0.3%) and mix it with the appropriate amount of solvent to reach 20 mL. Transfer this solution to an Erlenmeyer flask using a pipette for accuracy.

2. Add 3-5 mL of 3 mol/L sulfuric acid (H2SO4) to the flask containing the hydrogen peroxide solution.

3. Titrate the hydrogen peroxide solution with the standard (0.0200 mol/L) potassium permanganate (KMnO4) solution. Record the volume of KMnO4 required for the titration to be complete.

4. Analyze the results: The reaction equation and stoichiometry of the reactants can help you find the proportion of substance involved in the reaction. Use the information gathered in the experiment to calculate the percentage of hydrogen peroxide in the solution. Take into the account that the solution has a density of 1.00 g/mL.

Here is the list of equipment and chemicals you will need for the experiment:
- Hydrogen peroxide solution (approximately 0.3%)
- 3 mol/L H2SO4
- 0.0200 mol/L KMnO4, standard solution
- 240 mL Erlenmeyer flask
- Burette
- Small measuring cylinder
- Stand with a clamp holder
- Magnetic stirrer and magnetic stir bar
- Wash bottle
- Safety goggles

To determine the percentage of hydrogen peroxide (H2O2) in a solution by permanganate titration, follow these steps:

1. Calculate the volume of hydrogen peroxide solution you must measure in order to obtain a standard solution of approximately 20 mL. The exact calculation will depend on the concentration of the hydrogen peroxide solution you are using.

2. Add 3-5 mL of sulfuric acid to the erlenmeyer flask.

3. Titer the solution with a standard solution of potassium permanganate (KMnO4) with a concentration of 0.0200 mol/L. Record your titration attempts.

4. Explain the method you used for the titration. Consider what the reaction equations tell you about the proportions of substances in the reaction. Use this information to calculate the percentage of hydrogen peroxide in the solution. The bulk density of the solution should be equal to 1.00 g/mL.

Please note that the information provided at the end is not clear. If you have any specific questions or need further assistance, please let me know.

To determine the percentage of hydrogen peroxide (H2O2) in a solution using permanganate titration, you can follow the steps below:

1. Calculate the required volume of hydrogen peroxide solution:
- Determine the volume of the standard solution (approximately 20 mL in this case).
- Measure an equal volume of the hydrogen peroxide solution into an Erlenmeyer flask using a pipette as accurately as possible.

2. Add 3-5 mL of sulfuric acid to the Erlenmeyer flask containing the hydrogen peroxide solution. This acidifies the solution and facilitates the reaction.

3. Titrate the solution with a standard potassium permanganate (KMnO4) solution having a concentration of 0.0200 mol/L.
- Fill a burette with the standard KMnO4 solution.
- Slowly add the KMnO4 solution from the burette to the flask until a noticeable color change occurs (pink or purple).
- Note the volume from the burette that was needed to reach the color change. This volume represents the amount of KMnO4 required to react with the hydrogen peroxide.

4. Now that you have performed the titration, you need to analyze the results and calculate the percentage of hydrogen peroxide in the solution.
- Balanced reaction equation: 2MnO4- + 5H2O2 + 6H+ -> 2Mn2+ + 5O2(gas) + 8H2O
- From the balanced equation, you can see that 2 moles of MnO4- react with 5 moles of H2O2.
- Use stoichiometry to convert the volume (in mL) of KMnO4 solution used in the titration to moles of H2O2.
- The molar concentration of the KMnO4 solution is 0.0200 mol/L, so multiply the volume used by 0.0200 to get the moles of KMnO4 used.
- Then, using the stoichiometric ratio of 2:5, calculate the moles of H2O2 in the solution.
- Finally, calculate the percentage of H2O2 by dividing the moles of H2O2 by the total mass of the solution (given as 1.00 g/mL bulk density in this case) and multiplying by 100.

Remember to wear goggles and follow all safety precautions while performing the experiment.