3.2.4.3 Reactions of the Oxides

• What are Period 3 oxides formed by?

  Elements in Period 3
• Which acidic oxide is commonly used as an example?

  Sulfur trioxide
• What are two examples of basic oxides?

  Sodium oxide and magnesium oxide
• What type of reaction occurs when an acidic oxide reacts with a base?

  Neutralization
• What is the product when magnesium oxide reacts with sulfuric acid?

  Magnesium sulfate
• Basic oxides combine with acids to create salts and water.

  True
• What type of oxides react with both acids and bases?

  Amphoteric
• Arrange the steps of how amphoteric oxides react with acids:

  1️⃣ Amphoteric oxide behaves as a base

  2️⃣ Acid is neutralized

  3️⃣ Salt and water are formed
• What are amphoteric oxides capable of behaving as?

  Both acids and bases
• Silicon dioxide reacts with sulfuric acid to form silicic acid.


  True
• What salt is formed when silicon dioxide reacts with sodium hydroxide?

  Sodium silicate
• Acidic oxides react with water to form acids
• Match the oxide type with its reaction with water:

  Acidic ↔️ Forms acids

  Basic ↔️ Forms alkalis

  Amphoteric ↔️ Acts as both acids and bases
• Sodium oxide is a basic Period 3 oxide.


  True
• Basic oxides react with water to form acids.

  False
• What are the products formed when sulfur trioxide reacts with sodium hydroxide?

  Sodium sulfate and water
• Sodium oxide reacts with hydrochloric acid to form sodium chloride
• Sodium oxide reacts with water to form sodium hydroxide.


  True
• Amphoteric oxides react with water to form only neutral solutions.

  False
• What are acidic oxides defined as?

  Oxides that form acids
• What is the product of the reaction between sodium oxide and water?

  Sodium hydroxide
• Give an example of an acidic oxide.

  Sulfur trioxide
• Amphoteric oxides can react with water to form both acids and bases.


  True
• What is the primary energy source for decomposing oxides?

  Heat
• Basic oxides like Na₂O and MgO are generally more stable and require higher temperatures to decompose.

  True
• Match the Period 3 oxides with their applications:

  SO₃ ↔️ Production of sulfuric acid

  MgO ↔️ Refractory material

  SiO₂ ↔️ Glass production

  P₂O₅ ↔️ Production of phosphoric acid
• Match the oxide type with its description:

  Acidic ↔️ Reacts with water to form acids

  Basic ↔️ Reacts with water to form alkalis

  Amphoteric ↔️ Reacts as both acids and bases
• Phosphorus pentoxide is an example of a basic oxide.

  False
• Match the acidic oxide with a base and its product:

  SO₃ ↔️ 2NaOH → Na₂SO₄ + H₂O

  P₂O₅ ↔️ 3Ca(OH)₂ → 2Ca₃(PO₄)₂ + 3H₂O
• Sodium oxide reacts with hydrochloric acid to produce sodium chloride and water.


  True
• Basic oxides react with acids in a process called neutralization
• Magnesium oxide (MgO) is a basic oxide.

  True
• Basic oxides neutralize acids by donating oxygen.


  True
• When amphoteric oxides react with bases, they behave as acids
• Order the steps of the reaction between aluminium oxide (Al₂O₃) and hydrochloric acid (HCl):

  1️⃣ Al₂O₃ + 6HCl

  2️⃣ 2AlCl₃ + 3H₂O
• Aluminium oxide reacts with sodium hydroxide to form sodium aluminate.


  True
• Order the steps of the reaction between silicon dioxide (SiO₂) and sulfuric acid (H₂SO₄):

  1️⃣ SiO₂ + 2H₂SO₄

  2️⃣ H₂SiO₃ + 2H₂O
• Basic oxides react with water to form alkalis.


  True
• What is an example of a Period 3 oxide that reacts with water to form an acid?

  Sulfur trioxide
• Acidic oxides react with water to form acids