Choose the correct reaction:

Options

A. `BaCl_(2)+AcOH+K_(2)CrO_(4)to`yellow ppt.
B. `BaCO_(3)(s)+K_(2)C_(2)O_(4)+AcOH to`white ppt.
C. `BaCO_(3)(s) +K_(2)CrO_(4)+AcOH to`No ppt.
D. `SrCO_(3)(s)+K_(2)CrO_(4)+AcOH to`No ppt.

Explanation

To solve the question regarding the correct reaction among the options provided, we will analyze each reaction step-by-step.

### Step 1: Analyze Reaction A
**Reaction A:** Barium chloride (BaCl2) reacts with acetic acid (CH3COOH) and potassium chromate (K2CrO4).

- **Expected Products:**
- Barium ions (Ba²⁺) from BaCl2.
- Chromate ions (CrO4²⁻) from K2CrO4.
- **Precipitate Formation:**
- Barium chromate (BaCrO4) is formed, which is yellow in color.
- **Conclusion:** This reaction is correct as it produces a yellow precipitate.

### Step 2: Analyze Reaction B
**Reaction B:** Barium carbonate (BaCO3) reacts with potassium chromate (K2CrO4) and acetic acid (CH3COOH).

- **Expected Products:**
- Barium carbonate is insoluble in acetic acid, but it reacts to produce Ba²⁺ ions.
- **Precipitate Formation:**
- Ba²⁺ ions react with CrO4²⁻ to form barium chromate (BaCrO4), which is yellow.
- **Conclusion:** The statement claims a white precipitate is formed, which is incorrect. The reaction produces a yellow precipitate.

### Step 3: Analyze Reaction C
**Reaction C:** Barium carbonate (BaCO3) reacts with potassium chromate (K2CrO4) and acetic acid (CH3COOH).

- **Expected Products:**
- Similar to Reaction B, BaCO3 reacts to produce Ba²⁺ ions.
- **Precipitate Formation:**
- Again, Ba²⁺ ions will react with CrO4²⁻ to form yellow barium chromate.
- **Conclusion:** The statement claims no precipitate is formed, which is incorrect.

### Step 4: Analyze Reaction D
**Reaction D:** Strontium carbonate (SrCO3) reacts with potassium chromate (K2CrO4) and acetic acid (CH3COOH).

- **Expected Products:**
- Strontium carbonate is insoluble in acetic acid, producing Sr²⁺ ions.
- **Precipitate Formation:**
- Strontium chromate (SrCrO4) is expected to form, but it does not precipitate due to a higher solubility product (Ksp) compared to barium chromate.
- **Conclusion:** This reaction is correct as it states no precipitate is formed.

### Final Conclusion
The correct reactions are:
- **Option A:** Barium chloride with acetic acid and potassium chromate produces a yellow precipitate.
- **Option D:** Strontium carbonate with potassium chromate and acetic acid produces no precipitate.

### Summary of Correct Options
- **Correct Options:** A and D

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