Question

What are the spectator ions in the equation
 $ 2N{a^ + }(aq) + SO_4^{2 - }(aq) + B{a^{2 + }}(aq) + 2C{l^ - }(aq) \to BaS{O_4}(s) + 2N{a^ + }(aq) + 2C{l^ - }(aq)? $ .

Answer 1

Hint: Ions are atoms or molecules with a positive electrical charge. Ions are classified into three types: cations, anions, and spectator ions. A spectator ion is one that can be found on both the reactant and component sides of a chemical reaction.

Complete answer:
Spectator ions may be either cations (positively charged ions) or anions (negatively charged ions) (negatively-charged ions). The ion remains constant on all sides of a chemical equation and has no effect on equilibrium. Observer ions present in the initial equation are neglected when composing a net ionic equation. As a result, the complete ionic reaction differs from the net chemical reaction.
 $ 2N{a^ + }(aq) + SO_4^{2 - }(aq) + B{a^{2 + }}(aq) + 2C{l^ - }(aq) \to BaS{O_4}(s) + 2N{a^ + }(aq) + 2C{l^ - }(aq)? $
Here Barium and sulphate react to get barium sulphate.
The rest are spectator ions.
 $ {\text{B}}{{\text{a}}^{2 + }} + {\text{SO}}_4^{2 - } \to {\text{BaS}}{{\text{O}}_4}(s) \downarrow $
Which of the following is the net ionic equation. The spectator ions are merely along for the ride and are not involved in the macroscopic chemical transition.
 $ N{a^ + }\& C{l^ - } $ are the spectator ions in the reaction.
One group of elements that have spectator ions is the alkali metals from the first column of the periodic table. Ionic compounds with electrons, such as sodium and potassium, have ions that dissociate in solution to form Na or K ions. The halogen gases from the second to last column of the periodic table are a second category of elements that contain spectator ions. Chlorine and fluorine atoms combine to form the negatively charged ions Cl and F. These ions remain in solution until their ionic compounds dissociate, and do not participate in the resulting chemical reaction.

Note:
The inorganic compound with the chemical formula BaSO₄ is barium sulphate. It is a white crystalline solid that is odourless and water insoluble. It occurs naturally as the mineral barite, which is the primary industrial source of barium and products derived from it.