Which type of reaction has the general formula of [tex]$AB + CD \rightarrow AD + CB$[/tex]?
A. synthesis
B. decomposition
C. oxidation
D. replacement
Answer (2)
The reaction formula is A B + C D → A D + CB .
Synthesis reactions combine substances ( A + B → A B ).
Decomposition reactions break down substances ( A B → A + B ).
Replacement (double displacement) reactions exchange ions ( A B + C D → A D + CB ).
The correct reaction type is re pl a ce m e n t .
Explanation
Understanding the Reaction Formula The general formula for the reaction is given as A B + C Dr i g h t a rro w A D + CB . We need to identify the type of reaction that this formula represents from the given options: synthesis, decomposition, oxidation, and replacement.
Analyzing Reaction Types
Synthesis: A synthesis reaction involves the combination of two or more simple substances to form a more complex substance. The general form is A + B r i g h t a rro w A B .
Decomposition: A decomposition reaction involves the breakdown of a complex substance into simpler substances. The general form is A B r i g h t a rro w A + B .
Oxidation: An oxidation reaction involves the loss of electrons. This doesn't fit the general formula provided.
Replacement (Double Displacement): A replacement reaction, specifically a double displacement reaction, involves the exchange of ions between two reactants. The general form is A B + C Dr i g h t a rro w A D + CB .
Identifying the Reaction Type Comparing the given general formula A B + C Dr i g h t a rro w A D + CB with the definitions of the reaction types, it is clear that this formula represents a double displacement or replacement reaction, where A combines with D and C combines with B .
Conclusion Therefore, the correct answer is replacement .
Examples
Double displacement reactions are commonly observed in everyday life. For example, when you mix baking soda (sodium bicarbonate, N a H C O 3 ) with vinegar (acetic acid, C H 3 COO H ), a double displacement reaction occurs, producing carbon dioxide gas ( C O 2 ), water ( H 2 O ), and sodium acetate ( C H 3 COON a ). This reaction is responsible for the fizzing you see when baking soda and vinegar are mixed, and it's a practical example of how ions exchange partners to form new compounds.
The reaction represented by A B + C D → A D + CB is classified as a replacement reaction (also known as a double displacement reaction). In this type of reaction, components from two compounds exchange places to form new compounds. Therefore, the correct answer is replacement .
;
