Question

part c
list as many differences between these three species as you can.
check all that apply.
□ $\ce{so4^{2-}}$ is ion, $\ce{so2}$ and $\ce{so3}$ represent molecular compounds.
□ all represent ionic compounds.
□ the solubility in water differ.
□ number of oxygen atoms differ.

Explanation:

1. Analyze the first option: $\ce{SO_4^{2-}}$ is an ion (a polyatomic anion), while $\ce{SO_2}$ and $\ce{SO_3}$ are molecular compounds (covalent molecules). So this difference holds.
2. Analyze the second option: $\ce{SO_4^{2-}}$ is part of ionic compounds (e.g., $\ce{Na_2SO_4}$), but $\ce{SO_2}$ and $\ce{SO_3}$ are molecular (covalent) and not ionic compounds. So "All represent ionic compounds" is false.
3. Analyze the third option: $\ce{SO_2}$ (2 O atoms), $\ce{SO_3}$ (3 O atoms), and $\ce{SO_4^{2-}}$ (4 O atoms) have different numbers of oxygen atoms. So this difference holds.
4. Analyze the fourth option: $\ce{SO_2}$ and $\ce{SO_3}$ are acidic oxides with different solubilities in water, and $\ce{SO_4^{2-}}$ (from ionic salts like $\ce{Na_2SO_4}$) has different solubility behavior. So solubility in water can differ.

So the correct options are the first, third, and fourth (the checkboxes for "$\ce{SO_4^{2-}}$ is ion, $\ce{SO_2}$ and $\ce{SO_3}$ represent molecular compounds", "Number of oxygen atoms differ", and "The solubility in water differ").

Answer:

• $\ce{SO_4^{2-}}$ is ion, $\ce{SO_2}$ and $\ce{SO_3}$ represent molecular compounds
• Number of oxygen atoms differ
• The solubility in water differ