Question

the compound sodium sulfate is soluble in water. when this compound dissolves in water, which ions listed below would be present in solution?
a two na⁺ ions
b four o²⁻ ions
c one so₄²⁻ ion
d one s²⁻ ion

Explanation:

Step1: Write sodium sulfate formula

Sodium sulfate has the chemical formula $Na_2SO_4$.

Step2: Determine dissociation in water

When $Na_2SO_4$ dissolves in water, it dissociates as $Na_2SO_4
ightarrow 2Na^{+}+SO_4^{2 -}$.

Answer:

A. two $Na^{+}$ ions, C. one $SO_4^{2 -}$ ion