Sciencemadness Discussion Board
Not logged in [Login ]
Go To Bottom

Printable Version  
Author: Subject: Reaction of lead dioxide with Mn2+ ions
Wrecking Bereserker

Posts: 25
Registered: 2-4-2019
Member Is Offline

[*] posted on 3-4-2019 at 07:21
Reaction of lead dioxide with Mn2+ ions

Im trying to react lead dioxide with Mn2+ ions in acid medium it doesn't work when using H2SO4 does it only work with Nitric acid?

First of all im kind of confused why do we add medium(acidic,base) for certain reactions to happen they don't usually do anything right?
For example when in acid medium H2O2 + KMnO4 becomes Oxygen and Mn2+ each other oxidize and reduce then why is there the medium?
View user's profile View All Posts By User
International Hazard

Posts: 1213
Registered: 23-11-2017
Location: Rome-Italy
Member Is Offline

Mood: I'm a maddo scientisto!!!

[*] posted on 3-4-2019 at 13:20

The acidic or basic environment is important for reactions to happen. The reaction you used as an example Is a redox reaction, and to balance it you need H+ or OH-.
H2O2→O2 + 2H+ + 2e- (neutral reduced side→(2+) +(2-)=0 neutral oxidized side)
MnO4- + 8H+ + 5e- →Mn2+ + 4H2O ( (1-)+(8+)+(5-)=2+ on the oxidized side, 2+ on the reduced side)
5H2O2 + 2MnO4- + 8H+ + 10e- →2Mn2+ +5O2 + 8H2O +10e-
SO4-- and K+ are spectators
5H2O2 + 2KMnO4 + 3H2SO4 → 5O2 + 2MnSO4 + K2SO4 + 8H2O

As you can see we need H+ to balance the equations and get the right charge in the half reactions

[Edited on 3-4-2019 by Ubya]

feel free to correct my grammar, or any mistakes i make

If you are looking for chemicals check this out: [For Sale]300 chemicals (rare & unusual)
View user's profile View All Posts By User

  Go To Top