Chemistry: Single & Double Displacement Reactions

In a single displacement reaction, which ion is typically displaced?

Double displacement reactions always result in the formation of a precipitate.

What general pattern is represented by the equation A + BC → AC + B?

In double displacement reactions, ions in different compounds __________ places.

Match the type of reaction to its definition:

Single Displacement Reactions

In a single displacement reaction, one element replaces another element in a compound.
If the reacting element is a metal, it replaces the metal in the compound.
If the reacting element is a non-metal, it replaces the non-metal in the compound.
In reactions involving an ionic compound and a metal, the positive ion (cation) is replaced.
Example: CaI₂ + Cl₂ → CaCl₂ + I₂
Often occur in aqueous solution. Polyatomic ions remain unchanged.
Can occur when metals are placed in acid. Hydrogen acts like a metal in these reactions.
General pattern: A + BC → AC + B

Double Displacement Reactions

In double displacement reactions, elements in different compounds swap places.
Metal replaces metal, and non-metal replaces non-metal.
Metals can also displace hydrogen.
Often occur between two ionic compounds in solution.
Some ionic compounds are insoluble in water.
- If an insoluble compound forms, it appears as a precipitate, a solid in a liquid.
Not all double displacement reactions result in precipitation.
General pattern: AB + CD → AD + CB

Explore the concepts of single and double displacement reactions in chemistry. This quiz covers the mechanisms of these reactions, including how elements interact in aqueous solutions and the outcomes when metals and non-metals swap places. Test your knowledge with examples and fundamental principles.