Question

Of the chemical reactions shown below, which represents a double replacement reaction?

a 2 M g O yields 2 M g + O 2
b C H 4 + O 2 yields C O 2 + H 2 O
c 2 N a F + C a O yields N a 2 O + Ca F 2
d M g O + F 2 yields M g F 2, + O 2

Answer 1

A double replacement reaction occurs when two ionic compounds exchange ions to form two new compounds. The reaction 2NaF + CaO → Na2O + CaF2 is an example of a double replacement reaction, which is option c from the provided choices.

Step-by-step explanation:

Among the chemical reactions provided, the one that represents a double replacement reaction is option c. In a double replacement reaction, two compounds exchange partners with each other to form two new compounds. The general format for a double replacement reaction is AB + CD → AD + CB. Option c, 2NaF + CaO → Na2O + CaF2, matches this format with Na and Ca switching places.

To answer the other parts of the questions provided:

• Chemical equation a is not balanced because the product should be 2Na2O to balance the sodium atoms.
• Chemical equation b is balanced.
• Chemical equation c is balanced.