Add the reaction equations, arrange the coefficients, indicate the oxidation state of atoms, oxidizing agent

Add the reaction equations, arrange the coefficients, indicate the oxidation state of atoms, oxidizing agent, reducing agent and indicate the transition of electrons. A) Al + S; B) Mg + O2; B) Na + Cl2

1) The interaction of two aluminum atoms and three sulfur atoms leads to the formation of a trivalent aluminum sulfide salt. The molecular equation of the reaction can be written as follows:

2 Al + 3 S = Al2S3

The ionic reaction equation can be written as follows:

2 Al + 3 S = Al2 3+ + S32-

Al 0 – 3ē = Al 3+ – is oxidized, hence the reducing agent

S 0 + 2ē = S 2- – is reduced, hence the oxidizing agent.

2) Magnesium reacts with oxygen and forms magnesium oxide.

Mg + O2 = 2 MgO

The ionic reaction equation can be written as follows:

Mg0 + 2O 2- = 2 Mg 2+ + O2-

Mg0 – 2 ē = Mg 2+ – is oxidized, hence the reducing agent

2 O0 + 4 ē = 2 O 2- – is reduced, hence the oxidizing agent.