Reactivity Series Explained: Iron vs. Copper
The reactivity series is a list of chemical elements arranged in order of their reactivity. In chemistry, this series is crucial for predicting the outcome of reactions, particularly displacement reactions between metals and solutions of their salts.
Metals higher up in the reactivity series are considered more reactive. They tend to lose electrons more easily (oxidize) than metals lower down. A common reactivity series, from most reactive to least reactive, is often represented as:
| Reactivity Order | Metal Name | Symbol |
|---|---|---|
| 1 (Most Reactive) | Potassium | \(K\) |
| 2 | Sodium | \(Na\) |
| 3 | Calcium | \(Ca\) |
| 4 | Magnesium | \(Mg\) |
| 5 | Aluminium | \(Al\) |
| 6 | Zinc | \(Zn\) |
| 7 | Iron | \(Fe\) |
| 8 | Lead | \(Pb\) |
| 9 | Hydrogen | \(H\) |
| 10 | Copper | \(Cu\) |
| 11 (Least Reactive) | Silver | \(Ag\) |
| 12 | Gold | \(Au\) |
Comparing Iron's Reactivity
Looking at the reactivity series:
- Potassium (\(K\)), Sodium (\(Na\)), and Calcium (\(Ca\)) are all positioned above Iron (\(Fe\)). This means they are more reactive than iron.
- Iron (\(Fe\)) is positioned above Copper (\(Cu\)). This indicates that iron is more reactive than copper.
Conclusion
The question asks what element iron is more reactive than. Based on the standard reactivity series, iron (\(Fe\)) readily displaces less reactive metals from their compounds. Since copper (\(Cu\)) is below iron in the series, iron is more reactive than copper.
Therefore, iron is more reactive than copper.
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