Question

"The equation Mg(s) + 2HCl(aq) → MgCl₂(aq) + H₂(g) is an example of what type of reaction?

a) Synthesis
b) Decomposition
c) Single Replacement
d) Double Replacement"

Answer 1

The equation Mg(s) + 2HCl(aq) → MgCl₂(aq) + H₂(g) is an example of a double replacement reaction (d).

Step-by-step explanation:

The equation Mg(s) + 2HCl(aq) → MgCl₂(aq) + H₂(g) is an example of a double replacement reaction (d). In a double replacement reaction, two compounds exchange ions to form two new compounds. In this reaction, magnesium (Mg) from the solid and chloride ions (Cl-) from hydrochloric acid (HCl) exchange to form magnesium chloride (MgCl₂) and hydrogen gas (H₂).