how many faradays are needed to convert 1 mole of the following to the indicated product?

Question

(a) Fe3+ to fe2+

(b) NH3 to NO3-

(c) Cl2 to 2 ClO3-

(d) MnO4- to Mn2+

(e) Pb to PbO2

Answer 1

Step 1: What are the oxidation numbers for a) Fe, b) N, c) Cl, d) Mn, and e) Pb, before and after the reactions?

Step 2: determine the half reaction is a reduction (oxidation number becomes more negative by gaining electrons) or an oxidation ((oxidation number becomes more positive by losing electrons).

Step 3: how many electrons are involved based on a balanced half reaction?

Step 4: for each formula unit, the number of electron transferred =? How about Avogadro's number of formula units (aka 1 mole) react?

Simply place Faradays after the number of electron transferred.