This article picks up from Non-Linear Optimization using Extensions to LP and continues an exploration of what can be achieved using extensions to Linear Programming.
An anion is an ionic species having a negative charge. They are atoms that have gained electrons. Anions are one of the two types of ions. The other type is called a cation. Anions are attracted to the anode, while cations are attracted to the cathode. The concept of an anion is important in the corrosion industry because certain anions facilitate corrosion.
Cation Versus Anion. Cations are ions with a net positive charge. Cation Examples: Silver: Ag +, hydronium: H 3 O +, and ammonium: NH 4 + Anions are ions with a net negative charge. Anion Examples: hydroxide anion: OH-, oxide anion: O 2-, and sulfate anion: SO 4 2-Because they have opposite electrical charges, cations and anions are attracted to each other.