3.1.1 Definitions

• What is the definition of oxidation in terms of oxygen transfer?

  Loss of electrons, gain of oxygen
• Reduction is the gain of electrons by a substance, which is accompanied by the loss of oxygen
• Oxidation involves the loss of electrons by a substance.
• What is the definition of reduction in terms of electron transfer?

  Gain of electrons
• Oxidation is the increase in the oxidation number of an atom.
• Reduction is the decrease in the oxidation number of an atom.
• What happens to the oxidation number during oxidation?

  Increases
• Reduction involves a decrease in the oxidation number of an atom.
• What type of electron transfer occurs during oxidation?

  Loss of electrons
• Oxidation is accompanied by the gain of oxygen
• In terms of oxygen transfer, what is the key process in reduction?

  Oxygen lost
• Oxidation in terms of oxygen transfer involves the loss of oxygen.

  False
• What is the definition of oxidation in terms of oxygen transfer?

  Loss of electrons, gain of oxygen
• The key process in oxidation is electron loss
• In oxidation, oxygen is gained.
• Define oxidation in terms of electron transfer.

  Loss of electrons
• In reduction, oxygen is lost
• Reduction involves the gain of electrons.
• What happens to the oxidation number during oxidation?

  Increases
• In oxidation, the oxidation number increases
• The oxidation number decreases during reduction.
• Define oxidation in terms of oxidation number change.

  Increase in oxidation number
• During reduction, the oxidation number decreases
• Match the term with its definition:

  Oxidizing agent ↔️ Accepts electrons

  Reducing agent ↔️ Donates electrons
• What does an oxidizing agent do during a chemical reaction?

  Accepts electrons
• A reducing agent causes reduction by donating electrons
• A reducing agent loses electrons during a reaction.
• What is the effect of an oxidizing agent on a reaction?

  Causes oxidation
• The electron transfer in reduction results in a decrease in the oxidation number
• Arrange the following steps in a redox reaction involving electron transfer:

  1️⃣ Oxidation occurs with electron loss

  2️⃣ Reduction occurs with electron gain

  3️⃣ Oxidizing agent accepts electrons

  4️⃣ Reducing agent donates electrons
• In the combustion reaction, what is the oxidizing agent?

  Oxygen
• In the rusting process, iron undergoes oxidation by losing electrons
• During photosynthesis, carbon dioxide acts as an oxidizing agent.