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SingaporeCombined ScienceQuick questions
Chemistry: Reactions, Acids and Salts
Quick questions on Acids, bases and the pH scale explained: O-Level Combined Science
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What are classifying oxides?Show answer
Oxides are classified by how they behave with acids and alkalis:
What is q1?Show answer
State what all acids produce when dissolved in water, and give the pH range of an acidic solution. [2 marks]
What is q2?Show answer
Classify magnesium oxide and carbon dioxide as acidic or basic oxides, giving a reason for each. [2 marks]
What is q3?Show answer
Explain why a strong acid has a lower pH than a weak acid of the same concentration. [2 marks]
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