Redox reactions occur in many everyday experiences. three examples of common redox reactions that everyone is familiar with are outlined below. write the chemical equation for each of these reactions and identify the oxidizing agent and the reducing agent.

note: if needed, consult a web source to determine the reaction.

a. when silver jewelry or silverware tarnishes, it is reacting with s in the air to undergo a redox reaction.

b. when someone leaves a screwdriver sitting outside and it rusts, the iron in the screwdriver underwent a redox reaction.

c. the process of photosynthesis, which causes green plants to react with sunlight to form oxygen, is an example of a redox reaction.

a. 2Ag(s) + 1/2O₂(g) + H₂S(g) → Ag₂S(s) + H₂O (l)

Oxidizing agent: O

Reducing agent: Ag

b. Fe (s) + 3O₂  →   2Fe₂O₃ (s)

Oxidizing agent: O

Reducing agent: Fe

c. 6CO₂ (g) + 6H₂O (l) → C₆H₁₂O₆ (s)  + 6O₂ (g)

Oxidizing agent: C

Reducing agent: O

Explanation:

a. Silver reacts with S, which is in the air as H₂S

2Ag(s) + 1/2O₂(g) + H₂S(g) → Ag₂S(s) + H₂O (l)

Ag changes from 0 to +1, the oxidation state - Oxidation

O changes from 0 to -2, the oxidation state - Reduction

b. Iron reacts with O, from the air

Fe (s) + 3O₂  →   2Fe₂O₃ (s)

Fe changes from 0 to +3, the oxidation state - oxidation

O changes from 0 to -2, the oxidation state - Reduction

c. 6CO₂ + 6H₂O → C₆H₁₂O₆  + 6O₂

C changes from +4 to +1, the oxidation state - reduction

O changes from -2 to O, the oxidation state - oxidation

the correct answer is:

a. formation of precipitation