Iron(II) salts are chemical compounds that contain iron in its +2 oxidation state. They are often formed by the reaction of iron with acids, resulting in various salts such as ferrous sulfate and ferrous chloride. These salts are typically soluble in water and can appear as green or pale blue crystals. These compounds play important roles in various applications, including agriculture, where they are used as fertilizers to provide essential iron to plants. Additionally, Iron(II) salts are utilized in water treatment processes and as reducing agents in chemical reactions.