5) \( \mathrm{Al}(\mathrm{OH})_{3}+\mathrm{HCl} \)

When aluminum hydroxide (\( \mathrm{Al(OH)}_3 \)) reacts with hydrochloric acid (\( \mathrm{HCl} \)), a classic acid-base neutralization reaction occurs. The products of this reaction are aluminum chloride (\( \mathrm{AlCl}_3 \)) and water (\( \mathrm{H}_2\mathrm{O} \)). The balanced chemical equation for this reaction is: \[ \mathrm{Al(OH)}_3 + 3\mathrm{HCl} \rightarrow \mathrm{AlCl}_3 + 3\mathrm{H}_2\mathrm{O} \] This reaction showcases the ability of metal hydroxides to act as bases, neutralizing acids and forming salts and water. In real-world applications, this reaction plays a crucial role in water treatment processes, where aluminum hydroxide is utilized to remove impurities and clarify water. It's also applied in the pharmaceutical industry, particularly in antacids. By reacting with excess stomach acid, aluminum hydroxide helps neutralize acidity, providing relief from indigestion and heartburn.