Question

value: 3
identify the strong acid.
a. hydrochloric acid
b. milk of magnesia
c. soap water

4/5

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Explanation:

To identify the strong acid, we analyze each option:

• Option a: Hydrochloric acid ($\ce{HCl}$) is a well - known strong acid as it completely dissociates in water to produce $\ce{H+}$ and $\ce{Cl-}$ ions.
• Option b: Milk of magnesia is a suspension of magnesium hydroxide ($\ce{Mg(OH)2}$), which is a base, not an acid.
• Option c: Soap water is generally basic (alkaline) in nature, used for cleaning and has a pH greater than 7, so it is not an acid.

Answer:

a. Hydrochloric acid