Displacement Reactions
| Formula / Notation | A + BC → AC + B; AB + CD → AD + CB |
|---|---|
| Also Known As | Single displacement, double displacement (metathesis), substitution reaction (inorganic) |
What is Displacement Reactions?
Chemical reactions in which one element displaces another from a compound. Single displacement reactions occur when a more reactive element replaces a less reactive one. The activity series predicts which metals can displace other metals from solutions.
Formula & Notation
Other Names / Synonyms: Single displacement, double displacement (metathesis), substitution reaction (inorganic)
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Chemical reactions in which one element displaces another from a compound. Single displacement reactions occur when a more reactive element replaces a less reactive one. The activity series predicts which metals can displace other metals from solutions.
Displacement reactions are used in extraction of metals from ores (cementation), in silver plating (copper-silver displacement), in analytical precipitation reactions (gravimetric analysis), and in thermite reactions (Fe₂O₃ + Al → Al₂O₃ + Fe) used in welding rail joints.
Thermite-type displacement reactions (aluminium reducing metal oxides) are extremely exothermic and produce molten metal — severe burn and fire hazard. Displacement of hydrogen from acids by reactive metals (Na, K, Li) produces flammable H₂ gas and is violently exothermic.
The formula or notation for Displacement Reactions is: A + BC → AC + B; AB + CD → AD + CB