CH-5
Acids and alkalis
Chemistry · Secondary 3 · Medium · Acids and alkalis
Which statement describes why powdered citric acid does not react with solid iron(III) oxide in a dry kettle?
- Citric acid is not an acid when solid.
- Citric acid needs water to produce hydrogen ions.
- Iron(III) oxide is unreactive towards all acids.
- Citric acid is a base in the absence of water.
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