An example of a complex salt is

Options

A. Zinc sulphate
B. Sodium hydrogen sulphate
C. Iron(II) ammonium sulphate
D. Tetramminecopper(II) sulphate

Answer

To solve the question "An example of a complex salt is," we need to identify which of the given options is a complex salt. Here’s the step-by-step solution:

### Step 1: Understand the Definition of Complex Salt
A complex salt is a compound that contains one or more complex ions, which consist of a central metal atom bonded to one or more ligands (molecules or ions that donate electron pairs). Complex salts typically have a metal center surrounded by these ligands.

### Step 2: Analyze the Given Options
We will examine the four options provided to determine which one is a complex salt.

1. **Zinc Sulfate (ZnSO4)**:
- This compound dissociates into Zn²⁺ and SO₄²⁻ ions.
- It does not contain a complex ion; therefore, it is not a complex salt.

2. **Sodium Hydrogen Sulfate (NaHSO4)**:
- This compound dissociates into Na⁺ and HSO₄⁻ ions.
- Similar to Zinc Sulfate, it does not contain a complex ion; thus, it is not a complex salt.

3. **Iron(II) Ammonium Sulfate (Mohr's Salt)**:
- The formula is (NH₄)₂Fe(SO₄)₂·6H₂O.
- This is a double salt formed from ammonium sulfate and ferrous sulfate.
- It does not contain a complex ion, so it is not a complex salt.

4. **Tetraamine Copper(II) Sulfate (Cu(NH₃)₄SO₄·H₂O)**:
- This compound contains the complex ion [Cu(NH₃)₄]²⁺.
- The copper acts as the metal center, and ammonia (NH₃) acts as the ligand.
- Therefore, this is a complex salt.

### Step 3: Conclusion
Based on the analysis, the correct answer is **Tetraamine Copper(II) Sulfate (Cu(NH₃)₄SO₄·H₂O)**, which is option number 4.

### Final Answer
**An example of a complex salt is Tetraamine Copper(II) Sulfate (Cu(NH₃)₄SO₄·H₂O).**

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