Questions: Complete this table. name empirical formula --------------------------------------- potassium iodide 1 copper(I) sulfide

Transcript text: Complete this table. \begin{tabular}{|c|c|} \hline name & empirical formula \\ \hline potassium iodide & $\boxed{1}$ \\ \hline copper(I) sulfide & $\square$ \\ \hline \end{tabular}

Solution

Solution Steps

Step 1: Determine the Empirical Formula for Potassium Iodide

The empirical formula for potassium iodide is determined by the combination of potassium (K) and iodide (I) ions. Potassium has a charge of +1, and iodide has a charge of -1. Therefore, they combine in a 1:1 ratio to form the compound KI.

Step 2: Determine the Empirical Formula for Copper(I) Sulfide

Copper(I) sulfide is composed of copper ions with a +1 charge (Cu$^+$) and sulfide ions with a -2 charge (S$^{2-}$). To balance the charges, two copper ions are needed for every sulfide ion. Therefore, the empirical formula for copper(I) sulfide is Cu$_2$S.

Final Answer

\[ \begin{array}{|c|c|} \hline \text{name} & \text{empirical formula} \\ \hline \text{potassium iodide} & \boxed{\text{KI}} \\ \hline \text{copper(I) sulfide} & \boxed{\text{Cu}_2\text{S}} \\ \hline \end{array} \]

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