Question

Which is a spectator ion in the reaction between these two solutions babr2 + na2so4?

Answer 1

spectator  ion  are  ions  which   remain  unchanged  during  chemical  equation and  does  not  affect  equilibrium
chemical  equation  for  the  reaction  is as follows
  NaSO4   +Babr2  ---> 2  Nabr  +  BaSO4
ionic  equation   is  as  follows
Ba ^+2  +  SO^-2  --->BaSO4(s)
therefore  the spectator  ion  are Na+  and   Br-  ions

Answer 2

Answer:

Spectator ions: Na+ and Br-

Explanation:

In a chemical reaction, a spectator ion is a species that does not participate in the reaction and exists in the same form in both the reactants and products side.

The given equation is:

$BaBr_{2 }(aq)+ Na_{2}SO_{4}(aq)\rightarrow BaSO_{4}(s)+ 2NaBr(aq)$

The total ionic equation is

$Ba^{2+} + 2Br^{-}+ 2Na^{+} + SO_{4}^{2-}\rightarrow BaSO_{4}+ 2Na^{+}+ 2Br^{-}$

The ions that remain unchanged are: Na+ and Br- ions.

These can be cancelled out on either side to get the net ionic equation:

$Ba^{2+}  + SO_{4}^{2-}\rightarrow BaSO_{4}$