3.1.1 Definitions

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

  Loss of electrons
• What is the definition of reduction in terms of electron transfer?

  Gain of electrons
• Match the redox process with its characteristic:

  Oxidation ↔️ Loss of electrons

  Reduction ↔️ Gain of electrons
• In oxidation, a substance loses electrons and its oxidation state increases.


  True
• A reducing agent donates electrons and reduces other substances.


  True
• A reducing agent decreases the oxidation state of other substances.


  True
• What is an oxidizing agent in redox reactions?

  Accepts electrons
• What happens to the oxidation state of a substance when it acts as a reducing agent?

  Decreases
• What happens to the oxidation state of a substance during oxidation?

  Increases
• During reduction, a substance is reduced.


  True
• What is the role of a reducing agent in redox reactions?

  Reduces other substances
• What is the oxidation state change for chlorine in the reaction Mg + Cl₂ → MgCl₂?

  0 to -1
• In an oxidation reaction, the substance loses one or more electrons
• In a reduction reaction, the substance gains one or more electrons
• Oxidation and reduction are key processes in redox
• What is an oxidizing agent?

  Accepts electrons
• What is a reducing agent?

  Donates electrons
• An oxidizing agent oxidizes other substances, while a reducing agent reduces
• A reducing agent donates electrons to reduce other substances.


  True
• Oxidation involves the loss of electrons by a substance.

  True
• Reduction is the gain of electrons by a substance.
• Match the redox process with its effect on electron transfer:

  Oxidation ↔️ Loses electrons

  Reduction ↔️ Gains electrons
• Oxidation leads to an increase in oxidation state.


  True
• In oxidation, the substance loses electrons and its oxidation state increases.


  True
• In reduction, the substance gains electrons and its oxidation state decreases.


  True
• Order the steps to differentiate between oxidation and reduction in terms of electron transfer, oxidation state change, and substance role:

  1️⃣ Oxidation involves loss of electrons

  2️⃣ Reduction involves gain of electrons

  3️⃣ Oxidation results in increased oxidation state

  4️⃣ Reduction results in decreased oxidation state

  5️⃣ In oxidation, the substance is oxidized

  6️⃣ In reduction, the substance is reduced
• An oxidizing agent oxidizes other substances by accepting electrons
• An oxidizing agent increases the oxidation state of other substances.


  True
• What is the role of a reducing agent in a redox reaction?

  Reduces other substances
• An oxidizing agent accepts electrons in redox reactions.
• Oxidation involves the loss of electrons, while reduction involves the gain of electrons.
• What happens to the oxidation state of a substance during reduction?

  Decreases
• An oxidizing agent oxidizes other substances by accepting electrons.
• In the reaction Mg + Cl₂ → MgCl₂, magnesium is oxidized because it loses electrons.