Question

7 multiple choice 5 points
select the correct formula for potassium iodide.
○ ki₂
○ k₄i
○ k₃i₇
● ki
8 multiple choice 5 points
select the correct formula for copper (ii) chloride.
● cucl₂
○ cu₂cl
○ cucl
○ cu₂cl₂

Explanation:

Step1: Analyze potassium iodide ions

Potassium (K) has a +1 charge ($\text{K}^+$), iodide (I) has a -1 charge ($\text{I}^-$). To balance charge, 1 $\text{K}^+$ pairs with 1 $\text{I}^-$.

Step2: Analyze copper (II) chloride ions

Copper (II) has a +2 charge ($\text{Cu}^{2+}$), chloride (Cl) has a -1 charge ($\text{Cl}^-$). To balance charge, 1 $\text{Cu}^{2+}$ pairs with 2 $\text{Cl}^-$.

Answer:

1. KI
2. $\text{CuCl}_2$