Acid + active metal gives:

When a dilute acid reacts with an active metal (a metal positioned above hydrogen in the reactivity series, such as Magnesium, Zinc, or Iron), a chemical reaction occurs where the metal displaces the hydrogen from the acid. ### General Chemical Equation $$\text{Active Metal} + \text{Dilute Acid} \rightarrow \text{Salt} + \text{Hydrogen Gas (H}_2\text{)}$$ ### Example Reaction Consider the reaction between Magnesium ($Mg$) and Hydrochloric Acid ($HCl$): $$Mg(s) + 2HCl(aq) \rightarrow MgCl_2(aq) + H_2(g) \uparrow$$ In this reaction: 1. The Magnesium ($Mg$) replaces the Hydrogen ($H$) in the acid. 2. The product $MgCl_2$ is the salt (Magnesium Chloride). 3. $H_2$ gas is released, which can be identified by a 'pop' sound when tested with a burning splinter. Therefore, the products are a salt and hydrogen gas.