7.4

Oxides

10 flashcards to master Oxides

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Key Concept Flip

How are oxides of nitrogen formed in car engines?

Answer Flip

Nitrogen and oxygen from the air react at high temperatures inside the engine, forming oxides of nitrogen (

Example: NO, NO2).
Key Concept Flip

Answer Flip

Key Concept Flip

How can a metal carbonate be used to produce a metal oxide?

Answer Flip

A metal carbonate can be heated to produce a metal oxide through thermal decomposition. This process releases carbon dioxide gas.

Example: when copper(II) carbonate is heated, it decomposes into copper(II) oxide and carbon dioxide: CuCO3(s) → CuO(s) + CO2(g).
Key Concept Flip

Describe a chemical test to identify if a gas is ammonia (NH3).

Answer Flip

Add aqueous sodium hydroxide or damp red litmus paper to the gas. If ammonia is present, the litmus paper will turn blue.

Key Concept Flip

Answer Flip

Key Concept Flip

Give an example of a thermal decomposition reaction that produces a metal oxide.

Answer Flip

Heating calcium carbonate (CaCO3) decomposes it into calcium oxide (CaO) and carbon dioxide (CO2).

Definition Flip

Define a 'basic oxide' and provide an example.

Answer Flip

A basic oxide reacts with acids to form salts and water.

Example: Magnesium oxide (MgO) reacts with hydrochloric acid (HCl) to form magnesium chloride (MgCl2) and water (H2O).
Definition Flip

Define an 'acidic oxide' and provide an example.

Answer Flip

An acidic oxide reacts with bases to form salts and water.

Example: Sulfur dioxide (SO2) reacts with sodium hydroxide (NaOH) to form sodium sulfite (Na2SO3) and water (H2O).
Key Concept Flip

What type of oxide is produced when a nonmetal reacts with oxygen?

Answer Flip

Generally, nonmetals react with oxygen to form acidic oxides.

Example: sulfur reacts with oxygen to form sulfur dioxide (SO2), which is an acidic oxide.
Key Concept Flip

What type of oxide is produced when a metal reacts with oxygen?

Answer Flip

Generally, metals react with oxygen to form basic oxides.

Example: magnesium reacts with oxygen to form magnesium oxide (MgO), which is a basic oxide.

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7.3 Preparation of salts 8.1 Arrangement of elements

Key Questions: Oxides

Define a 'basic oxide' and provide an example.

A basic oxide reacts with acids to form salts and water.

Example: Magnesium oxide (MgO) reacts with hydrochloric acid (HCl) to form magnesium chloride (MgCl2) and water (H2O).
Define an 'acidic oxide' and provide an example.

An acidic oxide reacts with bases to form salts and water.

Example: Sulfur dioxide (SO2) reacts with sodium hydroxide (NaOH) to form sodium sulfite (Na2SO3) and water (H2O).

About Oxides (7.4)

These 10 flashcards cover everything you need to know about Oxides for your Cambridge IGCSE Chemistry (0620) exam. Each card is designed based on the official syllabus requirements.

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