Question

Which procedure would best allow a scientist to observe a chemical property of hydrochloric acid (HCI) solution?

Answer 1

Effervescence of h2 gas will be produced which burns off a glowing split with a pop sound when hcl reacts with a base

Answer 2

Answer:

Adding a piece of Zn

Explanation:

Adding zinc (Zn) to a hydrochloric (HCl) solution will prove its acidity with a redox reaction:

$Zn(s) + 2H^+(aq) \longrightarrow Zn^{+2}(aq) + H_2(g)$

This reaction can be confirmed,  by the observation of little bubbles in the surface of the metal: that bubbles are the hydrogen gas generated.