The properties of oxides
4 marks · NormalBelow is a table of some oxides and whether each produces an acidic, basic, or neutral solution when dissolved in water. Complete the table.
| Oxide | Solution formed in water (acidic, basic or neutral) |
|---|---|
| Iron(III) oxide | |
| Silicon dioxide | |
| Sodium oxide | |
| Nitrogen monoxide |
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(a) Iron(III) oxide – basic; Silicon dioxide – neutral; Sodium oxide – basic; Nitrogen monoxide – neutral
Also accept: accept neutral or no reaction for nitrogen monoxide and silicon dioxide
Common mistakes: Misidentifying silicon dioxide as acidic; Guessing all oxides are acidic/basic
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Marking points
A1 (a) · 1 mark · Iron(III) oxide: Correctly gives 'basic'.
A2 (a) · 1 mark · Silicon dioxide: Correctly gives 'neutral' or 'no reaction'.
A3 (a) · 1 mark · Sodium oxide: Correctly gives 'basic'.
A4 (a) · 1 mark · Nitrogen monoxide: Correctly gives 'neutral' or 'no reaction'.
Worked solution
Iron(III) oxide – basic; Silicon dioxide – neutral/no reaction; Sodium oxide – basic; Nitrogen monoxide – neutral/no reaction.