Which of the following will be precipitated when a solution containing calcium acetate, strontium acetate and barium acetate is treated with `(NH_(4))_(2)SO_(4)` ?

Options

A. `CaSO_(4) and SrSO_(4)`
B. `SrSO_(4) and BaSO_(4)`
C. `BaSO_(4) and CaSO_(4)`
D. `SrSO_(4)` only

Answer

To solve the problem of which compounds will be precipitated when a solution containing calcium acetate, strontium acetate, and barium acetate is treated with ammonium sulfate, we can follow these steps:

### Step 1: Identify the Cations Present
The solution contains:
- Calcium acetate: \( \text{Ca(CH}_3\text{COO)}_2 \)
- Strontium acetate: \( \text{Sr(CH}_3\text{COO)}_2 \)
- Barium acetate: \( \text{Ba(CH}_3\text{COO)}_2 \)

From these compounds, we can identify the cations present in the solution:
- \( \text{Ca}^{2+} \)
- \( \text{Sr}^{2+} \)
- \( \text{Ba}^{2+} \)

### Step 2: Understand the Reaction with Ammonium Sulfate
When the solution is treated with ammonium sulfate \((\text{(NH}_4)_2\text{SO}_4)\), we need to consider the solubility of the sulfate salts formed:
- Calcium sulfate \( \text{CaSO}_4 \)
- Strontium sulfate \( \text{SrSO}_4 \)
- Barium sulfate \( \text{BaSO}_4 \)

### Step 3: Determine the Precipitation of Sulfates
- **Calcium sulfate**: \( \text{CaSO}_4 \) is slightly soluble in water, and under normal conditions, it does not precipitate significantly.
- **Strontium sulfate**: \( \text{SrSO}_4 \) is insoluble in water and will precipitate.
- **Barium sulfate**: \( \text{BaSO}_4 \) is also insoluble in water and will precipitate.

### Step 4: Conclusion on Precipitation
From the above analysis, when the solution is treated with ammonium sulfate:
- \( \text{Sr}^{2+} \) will precipitate as \( \text{SrSO}_4 \).
- \( \text{Ba}^{2+} \) will precipitate as \( \text{BaSO}_4 \).
- \( \text{Ca}^{2+} \) will remain in solution as \( \text{CaSO}_4 \) does not precipitate significantly.

Thus, the compounds that will be precipitated are:
- Strontium sulfate \( \text{SrSO}_4 \)
- Barium sulfate \( \text{BaSO}_4 \)

### Final Answer
The correct option is: **Strontium sulfate and Barium sulfate**.

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