Question

fill in the name and empirical formula of each ionic compound that could be formed from the ions in this table.

cation	anion	empirical formula	name of compound
ca²⁺	so₃²⁻
fe³⁺	clo₂⁻
pb²⁺	bro⁻

Explanation:

Step1: Determine formula for $Ba^{2 +}$ and $NO_{2}^{-}$

The charges must balance. Two $NO_{2}^{-}$ are needed for one $Ba^{2+}$. So the empirical formula is $Ba(NO_{2})_{2}$, and the name is barium nitrite.

Step2: Determine formula for $Ca^{2+}$ and $SO_{3}^{2 -}$

The charges balance with a 1:1 ratio. The empirical formula is $CaSO_{3}$, and the name is calcium sulfite.

Step3: Determine formula for $Fe^{3+}$ and $ClO_{2}^{-}$

Three $ClO_{2}^{-}$ are needed for one $Fe^{3+}$. The empirical formula is $Fe(ClO_{2})_{3}$, and the name is iron(III) chlorite.

Step4: Determine formula for $Pb^{2+}$ and $BrO^{-}$

Two $BrO^{-}$ are needed for one $Pb^{2+}$. The empirical formula is $Pb(BrO)_{2}$, and the name is lead(II) hypobromite.

Answer:

cation	anion	empirical formula	name of compound
$Ca^{2+}$	$SO_{3}^{2 -}$	$CaSO_{3}$	calcium sulfite
$Fe^{3+}$	$ClO_{2}^{-}$	$Fe(ClO_{2})_{3}$	iron(III) chlorite
$Pb^{2+}$	$BrO^{-}$	$Pb(BrO)_{2}$	lead(II) hypobromite