Answer:
[tex]SO_4^-[/tex]
Explanation:
The sodium sulfate compound corresponds to a water soluble salt.
When a salt dissolves it will dissociate into the ions that compose it.
It dissociates into Cations (positively charged ions) and anions (negatively charged ions)
Sodium sulfate formula
[tex]Na_2SO_4[/tex]
Sodium sulfate when dissolved in water
[tex]Na_2SO_4\stackrel{H_2O}{\longrightarrow} 2Na^+SO_4^-[/tex]
Ions present in the solution:
[tex]Na^+[/tex] Cation
[tex]SO_4^-[/tex] Anion