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 na⁺ no₂⁻ k⁺ bro₃⁻ na⁺ io₃⁻

Explanation:

First Row (Cation: $\boldsymbol{\ce{Na+}}$, Anion: $\boldsymbol{\ce{NO2-}}$)

Step1: Balance charges

Sodium ion ($\ce{Na+}$) has a +1 charge, nitrite ion ($\ce{NO2-}$) has a -1 charge. To balance, we need 1 $\ce{Na+}$ and 1 $\ce{NO2-}$.

Step2: Write empirical formula

Combine the cation and anion: $\ce{NaNO2}$

Step3: Name the compound

Sodium nitrite (sodium for $\ce{Na+}$, nitrite for $\ce{NO2-}$)

Second Row (Cation: $\boldsymbol{\ce{K+}}$, Anion: $\boldsymbol{\ce{BrO3-}}$)

Step1: Balance charges

Potassium ion ($\ce{K+}$) has +1, bromate ion ($\ce{BrO3-}$) has -1. So 1 $\ce{K+}$ and 1 $\ce{BrO3-}$.

Step2: Empirical formula

$\ce{KBrO3}$

Step3: Name the compound

Potassium bromate (potassium for $\ce{K+}$, bromate for $\ce{BrO3-}$)

Third Row (Cation: $\boldsymbol{\ce{Na+}}$, Anion: $\boldsymbol{\ce{IO3-}}$)

Step1: Balance charges

Sodium ion ($\ce{Na+}$) +1, iodate ion ($\ce{IO3-}$) -1. So 1 $\ce{Na+}$ and 1 $\ce{IO3-}$.

Step2: Empirical formula

$\ce{NaIO3}$

Step3: Name the compound

Sodium iodate (sodium for $\ce{Na+}$, iodate for $\ce{IO3-}$)

Answer:

Cation	Anion	Empirical Formula	Name of Compound
$\ce{K+}$	$\ce{BrO3-}$	$\ce{KBrO3}$	Potassium Bromate
$\ce{Na+}$	$\ce{IO3-}$	$\ce{NaIO3}$	Sodium Iodate