Iron salts are chemical compounds formed when iron combines with anions, which are negatively charged ions. Common examples include ferrous sulfate and ferric chloride. These salts are often used in various applications, such as water treatment, agriculture, and as dietary supplements to address iron deficiency. In nature, iron salts can be found in minerals and are important for biological processes. They play a crucial role in the production of hemoglobin, the protein in red blood cells that carries oxygen. Additionally, iron salts are used in laboratories for various chemical reactions and analyses.