Halides of Be dissolve in organic solvent while of Ba do not

Options

A. High hydracation energy of Be halides
B. High lattice energy of barium halides
C. Large size of `Ba^(2+)`
D. Halides of Be are covvalent but that of Ba are ionic

Answer

To solve the question "Halides of Be dissolve in organic solvent while of Ba do not," we will analyze the properties of the halides of beryllium (Be) and barium (Ba) and their solubility in organic solvents.

### Step-by-Step Solution:

1. **Identify the Halides**:
- The halides of beryllium include compounds like BeCl2 (beryllium chloride).
- The halides of barium include compounds like BaCl2 (barium chloride).

2. **Determine the Nature of the Halides**:
- Beryllium chloride (BeCl2) is primarily covalent in nature.
- Barium chloride (BaCl2) is ionic in nature.

3. **Understand the Concept of Solubility**:
- Covalent compounds tend to be soluble in organic solvents due to their molecular nature and ability to interact with organic molecules.
- Ionic compounds, on the other hand, are generally insoluble in organic solvents because they require a polar solvent (like water) to dissociate into ions.

4. **Analyze the Solubility of Each Halide**:
- Since BeCl2 is covalent, it is soluble in organic solvents.
- Since BaCl2 is ionic, it is not soluble in organic solvents.

5. **Conclusion**:
- The statement is confirmed: halides of beryllium (like BeCl2) dissolve in organic solvents, while halides of barium (like BaCl2) do not.

### Final Answer:
The halides of beryllium dissolve in organic solvents due to their covalent nature, while the halides of barium do not dissolve in organic solvents because they are ionic.

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