Acidic salts are formed when a strong acid reacts with a weak base. They contain both a positive ion from the base and a negative ion from the acid. These salts can release hydrogen ions (H⁺) in solution, which makes the solution acidic. Common examples include ammonium chloride and sodium bisulfate. When dissolved in water, acidic salts can lower the pH of the solution. This property is useful in various applications, such as in food preservation and in the production of fertilizers. Understanding acidic salts is important in fields like chemistry and agriculture.