What is it and where do we see it? Redox What is it and where do we see it?

In the Environment

Corrosion

In Your Body

Fermentation

On Wounds

On Your Head

On Clothes

Reducing ores (smelting)

Fe + S → FeS Synthesis reactions

Fe + S → FeS Determining agents Electronegativity difference determines what is oxidized and what is reduced Reducing agents cause the reduction of another species Determining agents

Fe + S → FeS Determining agents Electronegativity difference determines what is oxidized and what is reduced Oxidizing agents cause the oxidation of another species Determining agents

Fe + S → FeS Determining agents S is more electronegative and therefore oxidizes Fe S is the oxidizing agent S itself is reduced Determining agents

Fe + S → FeS Determining agents S is more electronegative and therefore oxidizes Fe S is the oxidizing agent S itself is reduced Determining agents

Fe + S → FeS Determining agents S is more electronegative and therefore oxidizes Fe S is the oxidizing agent S itself is reduced Determining agents

Fe + S → FeS Determining agents S is more electronegative and therefore oxidizes Fe S is the oxidizing agent S itself is reduced Determining agents

Higher electronegativity? Oxidizing agent? What is reduced? Now You Try 2Na + Cl2 2 NaCl Higher electronegativity? Oxidizing agent? What is reduced? Determining agents

Determining agents Now You Try 2Na + Cl2 2 NaCl Higher electronegativity? Cl2 Oxidizing agent? Cl2 What is reduced? Cl2 Determining agents

Lower electronegativity? Reducing agent? What is reduced? Now You Try 4K + O2 2 K2O Lower electronegativity? Reducing agent? What is reduced? Determining agents

Lower electronegativity? K Reducing agent? K What is reduced? O2 Now You Try 4K + O2 2 K2O Lower electronegativity? K Reducing agent? K What is reduced? O2 Determining agents

Oxidation is the gain of oxygen 4K + O2 2 K2O K has gained an O and has been oxidized. Oxygen is the oxidizing agent. Oxygen has been reduced. Other Definitions

What is the oxidizing agent? What has been reduced? Now You Try 2 S2O32−(aq) + I2(aq) → S4O62−(aq) + 2 I−(aq) What has been oxidized? What is the oxidizing agent? What has been reduced? Other Definitions

S2O32− has gained oxygen. It has been oxidized. Now You Try 2 S2O32−(aq) + I2(aq) → S4O62−(aq) + 2 I−(aq) S2O32− has gained oxygen. It has been oxidized. Iodine is the oxidizing agent. Iodine itself has been reduced. Other Definitions

Oxidation may be the loss of hydrogen. CH3OH -> CH2O + H2 What has been oxidized? What is the oxidizing agent? Other Definitions

Oxidation may be the loss of hydrogen. CH3OH -> CH2O + H2 What has been oxidized? Methanol Other Definitions

OIL RIG LEO the lion says GER Oxidation may be the loss of electrons. Other Definitions