Which of the following properties don't help in differentitating, different hydrated isomers of `CrCl_(3).6H_(2)O` ?

Options

A. Conductivity measurement
B. Precipitation by `AgNO_(3)`
C. Dipole moment
D. Magnetic moment

Answer

To solve the question of which property does not help in differentiating different hydrated isomers of `CrCl3.6H2O`, we can follow these steps:

### Step 1: Understand the Complex
The complex `CrCl3.6H2O` can be represented as `CrCl3(H2O)6`. This indicates that there are three chloride ions and six water molecules associated with chromium.

### Step 2: Identify the Hydrated Isomers
The hydrated isomers of `CrCl3.6H2O` can be represented as:
1. `CrCl2(H2O)4` + 1 Cl (1 chloride ion outside the coordination sphere)
2. `CrCl(H2O)5` + 2 Cl (2 chloride ions outside the coordination sphere)
3. `Cr(H2O)6` + 3 Cl (all chloride ions inside the coordination sphere)

### Step 3: Analyze the Properties
Now, we will analyze the properties mentioned in the video transcript to determine which one does not help differentiate the isomers:

1. **Conductivity**: The conductivity of a solution depends on the number of ions present. Each hydrated isomer provides a different number of chloride ions when dissolved, thus conductivity can differentiate them.

2. **Precipitation with Silver Nitrate (AgNO3)**: The reaction with AgNO3 will yield different amounts of precipitate (AgCl) depending on the number of chloride ions in each isomer. Thus, this property can also differentiate the isomers.

3. **Dipole Moment**: The dipole moment is affected by the arrangement of the water and chloride ligands around the chromium ion. Since the arrangement changes with different isomers, dipole moment can also be used to differentiate them.

4. **Magnetic Moment**: The magnetic moment is determined by the number of unpaired electrons in the complex. Since all the isomers have chromium in the same oxidation state (+3), they will have the same number of unpaired electrons and thus the same magnetic moment. Therefore, this property does not help in differentiating the isomers.

### Conclusion
The property that does not help in differentiating the different hydrated isomers of `CrCl3.6H2O` is **magnetic moment**.

### Final Answer
**Magnetic moment** does not help in differentiating the different hydrated isomers of `CrCl3.6H2O`.

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