The formula to calculate the concentration of spectator ions is:
\[ \text{SI} = \frac{n \times V}{Vt} \]
Where:
A spectator ion is an ion that exists in the same form on both the reactant and product sides of a chemical equation. While it is present during the reaction, it does not directly participate in the reaction itself. It is called a “spectator” ion because it “watches” the reaction occur without getting involved. These ions can be either cations (positively charged) or anions (negatively charged).
