Add 2 mL of sodium hydroxide to 1 mL of potassium permanganate Then add hydrogen

Question

Add 2 mL of sodium hydroxide to 1 mL of potassium permanganate Then add hydrogen peroxide until the color change is complete From the change in color, identify the manganese product What is its formula? _ What evidence identifies the product from hydrogen peroxide? _ indicate the product is _ Complete the redox reaction and balance it under basic conditions (include phases foe the final equation): MnO_4 ^- + H_2 O_2 rightarrow Add 3 mL of sulfuric acid to 1 mL of potassium permanganate Then 3dd hydrogen peroxide until the color change is complete. From the change in color, identify the manganese product What is its formula? _ What evidence identifies the product from hydrogen peroxide? _ indicate the product is _. Complete the redox reaction and balance it under acidic conditions (include phases for the final equation): MnO_4 ^- + H_2 O_2 rightarrow Add hydrogen peroxide directly to 1 mL of potassium permanganate until the color change is complete. From the change in color, identify the manganese product What is its formula? _ What evidence identifies the product from hydrogen peroxide? _ indicate the product is _ Complete the redox reaction and balance it under neutral conditions (include phases for the final equation) MnO_4 ^- + H_2 O_2 rightarrow

Explanation / Answer

Q1.

Redox reaciton in basic condition:

split half cell:

MnO4- = MnO2

H2O2 = O2

balance O:

MnO4- = MnO2 + 2H2O

H2O2 = O2

balance H

4H+ + MnO4- = MnO2 + 2H2O

H2O2 = O2 + 2H+

balance charges

3e- + 4H+ + MnO4- = MnO2 + 2H2O

H2O2 = O2 + 2H+ + 2e-

balance e-

6e- + 8H+ + 2MnO4- = 2MnO2 + 4H2O

3H2O2 = 3O2 + 6H+ + 6e-

add all

3H2O2 + 6e- + 8H+ + 2MnO4- = 2MnO2 + 4H2O +  3O2 + 6H+ + 6e-

cancel common terms

3H2O2 + 2H+ + 2MnO4- = 2MnO2 + 4H2O +  3O2

add OH- for basic media

3H2O2 + 2H2O + 2MnO4- = 2MnO2 + 4H2O +  3O2 + 2OH-

cancel water

3H2O2 + 2MnO4- = 2MnO2 + 2H2O +  3O2 + 2OH-

this is now basic media

B)

Acidic conditions were already balanced, before we neutralized H+ ions

so

3H2O2 + 2H+ + 2MnO4- = 2MnO2 + 4H2O +  3O2

C)

no tpossible to do this via neutral conditions, since there is proton trnasfer

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