Question\begin{enumerate} \item Which of the following has the lowest solubility? \begin{enumerate} \item A. CaS \item B. CuS \item C. FeS \item D. MgS \end{enumerate} \item Which of the following compounds could be used to prepare a solution with a [S^{2-}]? \end{enumerate}
Studdy Solution
STEP 1
1. We are considering the solubility of sulfide compounds in water.
2. The solubility of metal sulfides can be influenced by the metal cation's properties.
3. The question is asking about the solubility of the compounds in water.
4. We are tasked with identifying the compound with the lowest solubility and determining which compound could be used to prepare a solution with sulfide ions .
STEP 2
1. Analyze the solubility of each compound.
2. Identify the compound with the lowest solubility.
3. Determine which compound can be used to prepare a solution with sulfide ions.
STEP 3
Consider the general solubility trends of metal sulfides. Many transition metal sulfides, such as CuS and FeS, are known to have low solubility in water.
STEP 4
Consult solubility rules or data: - CaS and MgS are more soluble compared to transition metal sulfides. - CuS is known to be particularly insoluble in water.
STEP 5
Based on the solubility analysis, CuS (Option B) has the lowest solubility among the given options.
STEP 6
To prepare a solution with , a more soluble sulfide compound is needed. CaS and MgS are more soluble and can dissociate to provide sulfide ions in solution.
The compound with the lowest solubility is , and compounds like or could be used to prepare a solution with .
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