Which compound reacts with an acid to form water and a salt?

Which compound reacts with an acid to form water and a salt?

• A. CH3Cl
• B. CH3COOH
• C. KOH
• D. KCl

Answer: (C)

The situation describes an acid-base neutralization, where a base reacts with an acid to form water and a salt. Potassium hydroxide provides OH- that grabs a proton from the acid, producing water, while the potassium ion pairs with the acid’s conjugate base to form a salt. For example, KOH reacting with HCl gives KCl and H2O, and with CH3COOH gives CH3COOK and H2O. The other options aren’t bases (a chloromethane), are acids (acetic acid), or are already a salt (potassium chloride), so they don’t produce water and salt with an acid.

The situation describes an acid-base neutralization, where a base reacts with an acid to form water and a salt. Potassium hydroxide provides OH- that grabs a proton from the acid, producing water, while the potassium ion pairs with the acid’s conjugate base to form a salt. For example, KOH reacting with HCl gives KCl and H2O, and with CH3COOH gives CH3COOK and H2O. The other options aren’t bases (a chloromethane), are acids (acetic acid), or are already a salt (potassium chloride), so they don’t produce water and salt with an acid.