They do not undergo any chemical change at all. These ions are called spectator ions since they don't participate in the chemical reaction at all they just "watch". A chemical equation written without the spectator ions is called a net ionic equation.
While spectator ions remain unchanged in solution and don't take part in the chemical reaction, they serve as a means of delivery for the materials required for the reaction. To get silver chloride, the sodium ion delivers the chlorine ion while the nitrate ion delivers the silver ion into the reaction. Spectator ions bring in the participants for the chemical reaction but then don't take part themselves.
Bert Markgraf is a freelance writer with a strong science and engineering background. Online he has written extensively on science-related topics in math, physics, chemistry and biology and has been published on sites such as Digital Landing and Reference. Related Articles What is a Precipitation Reaction? What is a Polyatomic Ion? Examples of Single Replacement Reactions.
What is a Double Replacement Reaction? How to Make 24K Gold. How to Test for Hydrochloric Acid. Are Ions Hydrophobic Or Hydrophilic? Spectator ions are those which are in solution but do not react. Are there any spectator ions for the reaction of sodium phosphate with calcium bromide? Stefan V. Sep 29, Yes, there are.
Explanation: In order to see whether or not you'll have spectator ions when this reaction takes place, examine the solubility of the chemical species involved in the reaction.
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