1.

What is oxidation? Which one of the following pairs of species is in its oxidized state?a. Mg / Mg2+ b. Cu / Cu2+c. O2 / O2- d. Cl2/ Cl-

Answer»

a. Mg/Mg2+

Here,

Mg loses two electrons to form Mg2+ ion.

Mg(s) ⟶ Mg2+(aq) + 2e-

Hence,

Mg/Mg2+ is an oxidized state.

b. Cu/Cu2+

Here,

Cu loses two electrons to form Cu2+ion.

Cu(s) ⟶ Cu2+(aq) + 2e-

c. O2/O2- 

Here,

Each O2- gains two electrons to form O2- ion.

Hence,

O2/O2- 

d. Cl2/Cl- is in a reduced state.

Here,

Each Cl gains one electron to form Cl- ion.

Cl2(g) + 2e- ⟶2 − Cl-(aq)

Hence,

Cl2/Cl- is in a reduced state.


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