Which of the followig reagents are used for the detection of acetate and oxalate ions respectively?

Options

A. `BaCl_(2) and CaCl_(2)`
B. `NaOH and BaCl_(2)`
C. `FeCl_(3) and CaCl_(2)`
D. `FeCl_(3) and NaOH`

Answer

To solve the question regarding the detection of acetate and oxalate ions, we can follow these steps:

### Step 1: Identify the ions
- The acetate ion is represented as CH₃COO⁻.
- The oxalate ion is represented as C₂O₄²⁻.

### Step 2: Determine the reagent for acetate ion detection
- Acetate ions can be detected using **ferric chloride (FeCl₃)**.
- When acetate ions react with ferric chloride, they produce a deep blood red coloration due to the formation of a complex.

### Step 3: Write the reaction for acetate ion detection
- The reaction can be represented as:
\[ \text{CH}_3\text{COO}^- + \text{FeCl}_3 \rightarrow \text{Fe(OH)}_2\text{CH}_3\text{COO} + 3\text{NaCl} \]
- This reaction indicates that the presence of acetate ions will yield a blood red coloration.

### Step 4: Determine the reagent for oxalate ion detection
- Oxalate ions can be detected using **calcium chloride (CaCl₂)**.
- When oxalate ions react with calcium ions, they form a white precipitate of calcium oxalate.

### Step 5: Write the reaction for oxalate ion detection
- The reaction can be represented as:
\[ \text{C}_2\text{O}_4^{2-} + \text{Ca}^{2+} \rightarrow \text{CaC}_2\text{O}_4 \downarrow \]
- This indicates that the presence of oxalate ions will yield a white precipitate.

### Conclusion
- Therefore, the reagents used for the detection of acetate and oxalate ions respectively are:
- **Ferric chloride (FeCl₃)** for acetate ions.
- **Calcium chloride (CaCl₂)** for oxalate ions.

### Final Answer
- The correct choice is: **Ferric chloride and Calcium chloride**.

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