Final answer:
The statement is true, as the reaction between acetic acid and magnesium produces hydrogen gas. This is a single replacement reaction where magnesium replaces the hydrogen in acetic acid, and evolution of a gas can be observed.
Step-by-step explanation:
The reaction between acetic acid and magnesium does indeed produce hydrogen gas, making the statement true. When magnesium reacts with acids, it tends to lose electrons and form magnesium ions (Mg2+), while the H+ ions from the acid gain electrons to form hydrogen gas (H2). The general reaction between a metal like magnesium and an acid results in the production of a salt and hydrogen gas. In the case of acetic acid, the reaction is as follows:
Mg(s) + 2 CH3CO2H(aq) → Mg(CH3CO2)2(aq) + H2(g)
This is an example of a single replacement reaction, where magnesium replaces the hydrogen in acetic acid. As with most reactions involving reactive metals and acids, the evidence of a chemical change includes evolution of a gas (hydrogen), which can be observed by the formation of bubbles, and in some cases heat is also released.