Which of the following salts is the most basic in aqueous solution?

Options

A. `FeCl_(3)`
B. `Pb(CH_(3)COO)_(2)`
C. `Al(CN)_(2)`
D. `CH_(3)COOK`

Explanation

To determine which of the following salts is the most basic in aqueous solution, we can analyze each option based on the nature of the ions produced when the salt dissolves in water.

### Step-by-Step Solution:

1. **Identify the Salts**: Let's denote the salts as A, B, C, and D. For this solution, we will focus on the salt CH3COOK (potassium acetate) as mentioned in the video transcript.

2. **Understand Basicity in Aqueous Solutions**: The basicity of a salt in aqueous solution is determined by the anion it produces when dissolved. Anions that are conjugate bases of weak acids tend to make the solution basic.

3. **Analyze the Anions**:
- **CH3COO⁻ (acetate ion)**: This is the conjugate base of acetic acid (a weak acid). Therefore, it has the potential to accept protons (H⁺) from water, making the solution basic.
- Other salts may produce anions from strong acids or neutral anions, which do not contribute to basicity.

4. **Consider the Cation**: The cation K⁺ (potassium ion) does not affect the basicity since it is derived from a strong base (KOH) and does not hydrolyze in water.

5. **Compare with Other Salts**:
- If other salts produce anions from strong acids (like Cl⁻ from HCl or Na⁺ from NaOH), they will not contribute to the basicity of the solution.
- Therefore, salts like NaCl or KCl would not make the solution basic.

6. **Conclusion**: Since CH3COO⁻ is the only anion among the options that can make the solution basic, CH3COOK is the most basic salt in aqueous solution.

### Final Answer:
The most basic salt in aqueous solution is **CH3COOK (potassium acetate)**.

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