Chemical Forums

Chemistry Forums for Students => Inorganic Chemistry Forum => Topic started by: Marcos Castillo on May 04, 2020, 03:23:56 AM

Title: Nonsense redox?
Post by: Marcos Castillo on May 04, 2020, 03:23:56 AM

Hello

Is it nonsense to point out and balance this reaction?

2e^-+MnO₂=>MnO₃+OH^-

My proposal is:

Valency +4:

2e^-+MnO₂+2H₂O=>[H₂MnO₄]^-2=>MnO₃+2OH^-

I cannot make sense and balance

I'm triyng to make sense of one paragraph of my texbook:

"The standard alkaline battery uses Zn and MnO₂. KOH separates them. OH^- ions react with Zn electrode to produce Zn(OH)₂ and free electrons. These electrons move through an electrical circuit to return to the MnO₂ electrode, where they react , to produce MnO₃ and OH^- ions. Both these chemical reactions produce a difference in potential voltage about 1,5V between both electrodes"

Thanks

Title: Re: Nonsense redox?
Post by: AWK on May 04, 2020, 03:46:19 AM

https://wiki2.org/en/Alkaline_battery

Title: Re: Nonsense redox?
Post by: Marcos Castillo on May 04, 2020, 06:02:54 AM

Thanks, AWK!