When an antacid tablet is used, calcium hydroxide interacts with hydrochloric acid in the stomach to form inert calcium chloride, \( \mathrm{CaCl}_{2} \) and water. Which of the following describes this reaction? Choose 1 answer: (A) \( \mathrm{Ca}(\mathrm{OH})_{2}+3 \mathrm{HCl} \rightarrow \mathrm{CaCl}_{2}+3 \mathrm{H}_{2} \mathrm{O} \) (B) \( \mathrm{Ca}(\mathrm{OH})_{2}+2 \mathrm{HCl} \rightarrow \mathrm{CaCl}_{2}+2 \mathrm{H}_{2} \mathrm{O} \) (C) \( 2 \mathrm{Ca}(\mathrm{OH})_{2}+\mathrm{HCl} \rightarrow 2 \mathrm{CaCl}_{2}+2 \mathrm{H}_{2} \mathrm{O} \) (D) \( \mathrm{Ca}(\mathrm{OH})_{2}+\mathrm{HCl} \rightarrow \mathrm{CaCl}_{2}+\mathrm{H}_{2} \mathrm{O} \)

When discussing the reaction of calcium hydroxide and hydrochloric acid, it’s fascinating to note that calcium hydroxide, commonly known as slaked lime, has been utilized since ancient times for various purposes, including agriculture and construction. Ancient Egyptians even used it in their mortar for building pyramids! The neutralization process with hydrochloric acid showcases its importance in balancing acidity in the human body, especially for those experiencing discomfort from excess stomach acid. In practice, using calcium hydroxide as an antacid is not just about remedying indigestion; it's also about how the body maintains pH balance. The careful interaction of these substances is a prime example of chemistry's role in health care. So next time you reach for that antacid, think about the historical significance of the compounds involved in keeping you comfortable. Remember to always check the dosage and consult a healthcare professional if needed!