Question

write the correct formula for each species: sulfur dioxide, sulfur trioxide, the sulfate ion. express your answers as chemical formulas separated by a comma. so₂, so₃, so₄²⁻ previous answers correct part b list as many similarities between these three species as you can. check all that apply. all contain 1 sulfur atom. all represent cations. all contain nonmetals only. all have a charge. all contain sulfur and oxygen. all represent anions. previous answers correct part c list as many differences between these three species as you can. check all that apply. so₄²⁻ is ion, so₂ and so₃ represent molecular compounds. all represent ionic compounds. the solubility in water differ. number of oxygen atoms differ.

Explanation:

For Part C, we analyze each option:

1. $\ce{SO_4^{2-}}$ is an ion, while $\ce{SO_2}$ and $\ce{SO_3}$ are molecular compounds (covalent), so this is a difference.
2. $\ce{SO_2}$ and $\ce{SO_3}$ are molecular (covalent) compounds, not ionic, so "All represent ionic compounds" is incorrect.
3. $\ce{SO_2}$, $\ce{SO_3}$, and $\ce{SO_4^{2-}}$ have different solubilities in water (e.g., $\ce{SO_2}$ and $\ce{SO_3}$ react with water, $\ce{SO_4^{2-}}$ salts have varying solubilities), so this is a difference.
4. $\ce{SO_2}$ has 2 O, $\ce{SO_3}$ has 3 O, $\ce{SO_4^{2-}}$ has 4 O, so the number of oxygen atoms differs.

So the correct options are the first, third, and fourth.

Answer:

$\ce{SO_4^{2-}}$ is ion, $\ce{SO_2}$ and $\ce{SO_3}$ represent molecular compounds, The solubility in water differ, Number of oxygen atoms differ. (Corresponding to the first, third, and fourth checkboxes being selected)