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
na⁺	po₃³⁻
ba²⁺	bro₄⁻
k⁺	clo₄⁻

Explanation:

Step1: Determine formula for $Mg^{2 +}$ and $NO_{3}^{-}$

The charges must balance. One $Mg^{2+}$ ion needs two $NO_{3}^{-}$ ions. So the empirical formula is $Mg(NO_{3})_{2}$, and the name is magnesium nitrate.

Step2: Determine formula for $Na^{+}$ and $PO_{3}^{3 -}$

Three $Na^{+}$ ions are needed to balance the - 3 charge of $PO_{3}^{3-}$. The empirical formula is $Na_{3}PO_{3}$, and the name is sodium phosphite.

Step3: Determine formula for $Ba^{2+}$ and $BrO_{4}^{-}$

One $Ba^{2+}$ ion needs two $BrO_{4}^{-}$ ions to balance the charges. The empirical formula is $Ba(BrO_{4})_{2}$, and the name is barium perbromate.

Step4: Determine formula for $K^{+}$ and $ClO_{4}^{-}$

The charges are already balanced with a 1:1 ratio. The empirical formula is $KClO_{4}$, and the name is potassium perchlorate.

Answer:

cation	anion	empirical formula	name of compound
$Na^{+}$	$PO_{3}^{3 -}$	$Na_{3}PO_{3}$	sodium phosphite
$Ba^{2+}$	$BrO_{4}^{-}$	$Ba(BrO_{4})_{2}$	barium perbromate
$K^{+}$	$ClO_{4}^{-}$	$KClO_{4}$	potassium perchlorate