Chemical Reactions: Displacement Types

What is the general pattern for single displacement reactions?

In a double displacement reaction, what is typically exchanged between the reactants?

Which factor contributes to the formation of a precipitate in a double displacement reaction?

In a reaction between a metal and an acid, what role does hydrogen play?

What occurs during a single displacement reaction involving an ionic compound and a metal?

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 displaced.
Example: Ca + I₂ → CaI₂ + I₂
Single displacement reactions frequently happen in aqueous solutions where the polyatomic ions don't break down..
Reactions can also happen when metals are added to acids. Acids contain hydrogen atoms. Metals displace hydrogen in acids.
General pattern: A + BC → AC + B

Double Displacement Reactions

In a double displacement reaction, elements from different compounds swap places.
Metals replace metals; non-metals replace non-metals
Metals can replace hydrogen
Usually involve two ionic compounds in a solution.
If an insoluble compound forms, it separates as a precipitate.
Precipitate is a solid in a liquid solution.
Not all double displacement reactions form precipitates.
General pattern: AB + CD → AD + CB

This quiz covers the concepts of single and double displacement reactions in chemistry. You will learn how elements replace each other in these reactions and the conditions under which they occur. Test your understanding of the patterns and examples associated with these important types of chemical reactions.