# A student investigates the reaction between dilute sulfuric acid and copper(II) oxide powder. She observes that the black powder dissolves and a blue solution forms. Explain what type of reaction is occurring and identify the salt produced.

> Pearson Edexcel International GCSE Chemistry (4CH1) — 3.4 Acids, alkalis and salts · Explain · 4 marks

> Copper(II) oxide is a base. Dilute sulfuric acid has the formula H₂SO₄. The blue solution formed contains copper(II) sulfate.

## Mark scheme (4 marks)

1. The reaction is a neutralisation reaction
2. An acid reacts with a base to form a salt and water
3. Copper(II) oxide is the base (accepting the acid)
4. The salt produced is copper(II) sulfate

## Key terms

- [salt](https://www.gradenine.co.uk/glossary/salt)

## Related

- [Revision notes for Pearson Edexcel International GCSE Chemistry (4CH1)](https://www.gradenine.co.uk/learn)
- [How to answer "Explain" questions](https://www.gradenine.co.uk/tools/command-word-cheatsheet)
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Source: [GradeNine](https://www.gradenine.co.uk/q/a-student-investigates-the-reaction-between-a270ce2b) · Published by Druglandscape Ltd.