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Answer the following: Identify oxidising agents and arrange them in order of increasing strength under standard state conditions. The standard potentials are given in parenthesis. - Chemistry

Short Note

Answer the following:

Identify oxidising agents and arrange them in order of increasing strength under standard state conditions. The standard potentials are given in parenthesis.

Al  (–1.66V), Al3+(–1.66V),  Cl2  (1.36V),  Cd2+ (–0.4V), Fe (–0.44V),  I2 (0.54V),  Br- (1.09V).

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Solution

  1. The species on the left-hand side of the half-reactions are oxidising agents. Thus, oxidising agents are `"Al"^(3+), "Cl"_2, "Cd"^(2+), and "I"_2`.
  2. Larger the E° value greater is the strength of oxidising agent.
    Increasing strength of oxidising agents is as follows:

`"Al"_((- 1.66 "V"))^(3+) < "Cd"_((-0.4 "V"))^(2+) < "I"_(2(0.54 "V")) < "Cl"_(2(1.36 "V"))`

Concept: Electrochemical Series (Electromotive Series)
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APPEARS IN

Balbharati Chemistry 12th Standard HSC Maharashtra State Board
Chapter 5 Electrochemistry
Exercise | Q 4.12 | Page 119
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