A neutralization reaction is a chemical process where an acid reacts with a base to produce water and a salt. This reaction typically occurs when hydrogen ions from the acid combine with hydroxide ions from the base, resulting in the formation of water. The remaining ions form a salt, which can vary depending on the specific acid and base involved. Neutralization reactions are important in various applications, including titration in laboratories, where the concentration of an acid or base is determined. They also play a crucial role in everyday life, such as in antacids that help relieve heartburn by neutralizing excess stomach acid.