7.2.2 — Oxides: Classification & Reactions
Cambridge IGCSE Chemistry (0620) • Papers 2 & 3 • Core Content
🧪 Quick Reference: Oxide Classification
Section A: General Classification Rules
What type of oxide is generally formed when a metal reacts with oxygen?
What type of oxide is generally formed when a non-metal reacts with oxygen?
State what is meant by an acidic oxide. Give one example to support your answer.
State what is meant by a basic oxide. Give one example to support your answer.
Which of the following is a neutral oxide?
Section B: Specific Oxide Examples
Classify sulfur dioxide (SO₂) as acidic, basic, or neutral.
Copper(II) oxide (CuO) reacts with dilute sulfuric acid. (a) Classify CuO as acidic, basic, or neutral. (b) Write the word equation for this reaction.
Write the balanced symbol equation for the reaction between magnesium oxide and hydrochloric acid. Include state symbols.
Iron(III) oxide (Fe₂O₃) is the main component of rust. How should it be classified?
Phosphorus(V) oxide (P₄O₁₀) dissolves in water. Predict whether the resulting solution is acidic, alkaline, or neutral. Explain your answer.
Section C: Reactions of Oxides
Carbon dioxide is bubbled through aqueous sodium hydroxide solution. (a) State the type of reaction occurring. (b) Name the products formed.
Sulfur trioxide (SO₃) is bubbled into water. Write the balanced equation for this reaction and state the type of reaction.
Calcium oxide (CaO) is added to water. (a) State the type of reaction. (b) Write the equation. (c) State the pH of the resulting solution.
Which of the following correctly describes what happens when an acidic oxide reacts with an alkali?
A student claims that zinc oxide (ZnO) is a basic oxide because zinc is a metal. Evaluate this claim. Is the student fully correct? Explain.
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