Question

Use the following half-reactions to write three spontaneous reactions , calculate for each reaction, and rank the strengths of the oxidizing and reducing agents:

(1)

(2)

(3)

Short answer

The reaction to be spontaneous to be combined and reversed solution and the cancel common terms of oxidising agents and reducing agents.

Step-by-step solution

To Write three spontaneous reactions from the given half-reactions

Spontaneous reactions

(1)

(2)

(3)

(a) Combine (1) and reversed of (2):

Cancel common terms to obtain the spontaneous reaction:

(b) Combine (1) and reversed of (3):

Cancel common terms to obtain the spontancous reaction:

(c) Combine (2) and reversed of (3):

Cancel common terms to obtain the spontaneous reaction:

Oxidising agents :

Reducing agents :

Therefore ,the work is done is

(a)

(b

(c)

Oxidising agents :

Reducing agents :