Similar to a molecular equation , which expresses compounds as molecules, an ionic equation is a chemical equation in which the electrolytes in aqueous solution are expressed as dissociated ions. Usually, this is a salt dissolved in water, where the ionic species are followed by aq in the equation to indicate they are in aqueous solution. The ions in aqueous solutions are stabilized by ion-dipole interactions with water molecules. However, an ionic equation may be written for any electrolyte that dissociates and reacts in a polar solvent.
Writing Equations for Redox Reactions
How to Balance Net Ionic Equations
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Net Ionic Equation Definition
When writing an ionic equation, state symbols of the substances must be clearly indicated. Only ionic compounds which are soluble in water forming aqueous solution will dissociate into ions in water. Insoluble substance cannot dissociate into ions in water. The following diagram shows how to write the ionic equation for the reaction of aqueous sodium carbonate with aqueous barium nitrate. Scroll down the page for more examples and solutions on writing ionic equations.
Chemistry Stack Exchange is a question and answer site for scientists, academics, teachers, and students in the field of chemistry. It only takes a minute to sign up. Connect and share knowledge within a single location that is structured and easy to search. According to the rules of writing ionic equation, only compounds in aqueous state can be split or dissociated into their ions, whereas elements or compounds in solid, liquid or gas state remain as they are. But what about molten sodium chloride which is NaCl l in liquid state, isn't it dissociated into ions when melted?