Chemical AnalysisComparison
Pure vs Impure: Everyday Examples
Part of Purity & Formulations — GCSE Chemistry
This comparison covers Pure vs Impure: Everyday Examples within Purity & Formulations for GCSE Chemistry. Revise Purity & Formulations in Chemical Analysis for GCSE Chemistry with 20 exam-style questions and 12 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 8 of 13 in this topic. Use this comparison to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 8 of 13
Practice
20 questions
Recall
12 flashcards
⚖️ Pure vs Impure: Everyday Examples
| Item | Pure or Impure? | Explanation |
|---|---|---|
| Distilled water | Pure | Only H₂O molecules |
| 24-carat gold | Nearly pure | Very high % gold; minimal other metals |
| Tap water | Impure | Contains dissolved salts, chlorine, fluoride |
| Sea water | Impure | Water plus ~3.5% dissolved salts |
| Air | Impure | Mixture of gases: 78% N₂, 21% O₂, 1% others |
| Orange juice | Impure | Water, sugars, acids, vitamins — many compounds |
| Steel | Impure (formulation) | Iron mixed with carbon and other elements |