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2.3 Ionic bonding

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Question 17
H

A sample of solid aluminium oxide, Al2O3\mathrm{Al_{2}O_{3}}Al2​O3​, contains 6.0 × 1020 oxide ions, O2−\mathrm{O^{2-}}O2−.

How many aluminium ions, Al3+\mathrm{Al^{3+}}Al3+, does the sample contain, and why does the solid have no overall charge?

[1]
A

6.0×10206.0\times10^{20}6.0×1020, because it contains equal numbers of positive and negative ions

B

4.0×10204.0\times10^{20}4.0×1020, because the total positive charge equals the total negative charge

C

9.0×10209.0\times10^{20}9.0×1020, because the total positive charge equals the total negative charge

D

4.0×10204.0\times10^{20}4.0×1020, because it contains equal numbers of positive and negative ions

Markscheme

2.3 Ionic bonding Questions

  1. GCSE
  2. /Chemistry
  3. /2.3 Ionic bonding

56 exam-style questions on Edexcel GCSE Chemistry 2.3 Ionic bonding, covering 2.3.1 Ions and the formation of ionic bonds, 2.3.2 Naming and deducing formulae of ionic compounds, and 2.3.3 Giant ionic lattices. Each one has a worked solution and a mark scheme showing where the marks go.

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