Which of these equations represents a double displacement chemical reaction?AB ---> A + BAX + BY ---> AY + BXA + B ---> ABA + BX ---> AX + B

Break Down the Problem

1. Identify the given reactions.
2. Determine the characteristics of a double displacement reaction.
3. Evaluate each reaction to find the correct one.

Relevant Concepts

A double displacement reaction, also known as a double replacement reaction, occurs when two compounds exchange ions or elements to form two new compounds. The general form is:

$AB + CD \rightarrow AD + CB$

Analysis and Detail

1. AB → A + B
   This represents a decomposition reaction, where a single compound breaks down into simpler products.

2. AX + BY → AY + BX
   This matches the form of a double displacement reaction, where the cations and anions have switched places.

3. A + B → AB
   This is a combination reaction where two elements combine to form a compound.

4. BX → AX + B
   This again resembles a decomposition reaction, as one compound is forming two products.

Verify and Summarize

Among the options, only the second reaction, AX + BY → AY + BX, accurately represents a double displacement reaction by exchanging elements between two compounds.

Final Answer

The equation that represents a double displacement chemical reaction is:
$AX + BY \rightarrow AY + BX$