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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: Nitin_Naudiyal on May 23, 2013, 01:13:15 AM

Title: Calculate the Charge Required
Post by: Nitin_Naudiyal on May 23, 2013, 01:13:15 AM

How much charge is required for the following reduction?
a) 1 Mole of MnO₄^- to Mn²⁺

In the Solution, the follwing equation is mentioned
MnO₄^- + 8H⁺ + 5e^-  :rarrow: Mn²⁺ + 4H₂O

Here, 5 Moles of e^- are reqiured and the amount of charge required is 5F

I have the following questions.
1) How is the equation obtained ?
2) Is it possible to determine the no. of Moles of electron invovled in  the reaction without knowing the equation.

Thank you for your Help.

Title: Re: Calculate the Charge Required
Post by: Dan on May 23, 2013, 02:40:42 AM

Start by googling "how to balance redox equations" or something like that. There are many tutorials, including youtube videos, on this subject.

Title: Re: Calculate the Charge Required
Post by: Hunter2 on May 23, 2013, 04:39:51 AM

Other possibility compare the Oxidation number of the Manganese in Permanganate and in Manganese-II.  MnO₄^- to Mn²⁺