Question

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

some ionic compounds

cation	anion	empirical formula	name of compound
$nh_{4}^{+}$	$cro_{4}^{2 - }$
$k^{+}$	$so_{4}^{2 - }$

Explanation:

Step1: Determine formula for $Ca^{2 +}$ and $BrO_{3}^{-}$

To balance the charges, we need 2 $BrO_{3}^{-}$ for 1 $Ca^{2+}$. The empirical formula is $Ca(BrO_{3})_{2}$. The name is calcium bromate.

Step2: Determine formula for $NH_{4}^{+}$ and $CrO_{4}^{2 -}$

To balance the charges, we need 2 $NH_{4}^{+}$ for 1 $CrO_{4}^{2-}$. The empirical formula is $(NH_{4})_{2}CrO_{4}$. The name is ammonium chromate.

Step3: Determine formula for $K^{+}$ and $SO_{4}^{2 -}$

To balance the charges, we need 2 $K^{+}$ for 1 $SO_{4}^{2-}$. The empirical formula is $K_{2}SO_{4}$. The name is potassium sulfate.

Answer:

Cation	Anion	Empirical formula	Name of compound
$NH_{4}^{+}$	$CrO_{4}^{2 -}$	$(NH_{4})_{2}CrO_{4}$	Ammonium chromate
$K^{+}$	$SO_{4}^{2 -}$	$K_{2}SO_{4}$	Potassium sulfate