Question

question 11 of 22 > determine the formula unit for the compound formed when each pairs of ions interact. li+ and o2-: li2o mg2+ and s2-: mgs al3+ and cl-: na+ and n3-: na3n

Explanation:

Step1: Balance charges for $Al^{3 +}$ and $Cl^{-}$

To form a neutral compound, the total positive charge must equal the total negative charge. Since $Al^{3+}$ has a charge of + 3 and $Cl^{-}$ has a charge of - 1, we need 3 $Cl^{-}$ ions to balance the + 3 charge of one $Al^{3+}$ ion.

Step2: Write the formula unit

The formula unit is $AlCl_{3}$.

Answer:

$AlCl_{3}$