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
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
1 answer
3 answers