[15 points, hlp]
complete the half equations by balancing it and identify as either oxidation or reduction.

cl^- (aq) → cl2 (g)

f^- (aq) → f2 (g)

s (s) → s^2- (aq)

h2 (g) → h^+ (aq)

o2 (g) → o^2 (aq)

The half reactions are given below.

Explanation:

Oxidation reactions are defined as the reactions in which a chemical species looses its electrons. The oxidation state of the specie increases.

Reduction reactions are defined as the reactions in which a chemical species gains its electrons. The oxidation state of the specie gets reduced.

For the given reactions:

1.)

Here, the oxidation state is getting increased, therefore it is an oxidation reaction. The equation for this follows:

2.)

Here, the oxidation state is getting increased, therefore it is an oxidation reaction. The equation for this follows:

3.)

Here, the oxidation state is getting reduced, therefore it is an reduction reaction. The equation for this follows:

4.)

Here, the oxidation state is getting increased, therefore it is an oxidation reaction. The equation for this follows:

5.)

Here, the oxidation state is getting reduced, therefore it is an reduction reaction. The equation for this follows:

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-

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