`KCl.MgCl_2. 6H_2O` is a

Options

A. mixed salt
B. double salt
C. basic salt
D. complex salt

Answer

To determine the classification of the compound KCl·MgCl₂·6H₂O, we can follow these steps:

### Step 1: Identify the components of the compound
The compound KCl·MgCl₂·6H₂O consists of:
- KCl (Potassium Chloride)
- MgCl₂ (Magnesium Chloride)
- 6H₂O (Water of crystallization)

### Step 2: Understand the definitions
- **Mixed Salt**: A salt that contains more than one type of cation or anion.
- **Double Salt**: A type of salt that contains two different cations or anions and can dissociate into its constituent ions in solution.
- **Basic Salt**: A salt that contains a basic ion (like hydroxide) and does not completely dissociate in solution.
- **Complex Salt**: A salt that contains a complex ion.

### Step 3: Analyze the dissociation in solution
When KCl·MgCl₂·6H₂O is dissolved in water, it dissociates into:
- K⁺ (Potassium ion)
- Mg²⁺ (Magnesium ion)
- 2 Cl⁻ (Chloride ions, from MgCl₂)
- 6 H₂O (Water molecules)

### Step 4: Classification based on dissociation
Since KCl·MgCl₂·6H₂O dissociates into more than one type of cation (K⁺ and Mg²⁺) and anions (Cl⁻), it fits the definition of a double salt.

### Conclusion
Thus, KCl·MgCl₂·6H₂O is classified as a **double salt**.

### Final Answer
The correct classification of KCl·MgCl₂·6H₂O is **Double Salt**.

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