Question

calcium chloride reacts with sodium to produce sodium chloride and calcium. what type of reaction is this?
a double displacement
b combustion
c single displacement
d synthesis

Explanation:

A single displacement reaction occurs when one element replaces another in a compound. In the reaction \(CaCl_2 + 2Na
ightarrow 2NaCl+Ca\), sodium (\(Na\)) replaces calcium (\(Ca\)) in calcium chloride (\(CaCl_2\)).

• Double displacement reactions involve the exchange of ions between two compounds (e.g., \(AB + CD

ightarrow AD+CB\)).

• Combustion reactions involve a substance reacting with oxygen (e.g., \(C_xH_y + O_2

ightarrow CO_2 + H_2O\)).

• Synthesis reactions involve combining two or more substances to form a single product (e.g., \(A + B

ightarrow AB\)).

Since sodium replaces calcium in the compound, it is a single displacement reaction.

Answer:

C. Single Displacement