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Mohr's salt is...

Mohr's salt is

A

`FeS_(2).7H_(2)O`

B

`FeSO_(4)(NH_(4))_(2)SO_(4).6H_(2)O`

C

`Fe_(2)(SO_(4))_(3)(NH_(4))_(2)SO_(4).24H_(2)O`

D

`K_(2)SO_(4).Fe_(2)(SO_(4))_(3).24H_(2)O`

Text Solution

AI Generated Solution

The correct Answer is:
To determine what Mohr's salt is, we need to analyze the given options and identify the correct chemical formula. Here’s a step-by-step breakdown: ### Step 1: Identify Mohr's Salt Mohr's salt is a double salt that consists of two different cations. The common cations in Mohr's salt are ferrous ions (Fe²⁺) and ammonium ions (NH₄⁺). ### Step 2: Write the General Formula The general formula for Mohr's salt can be represented as: \[ \text{(NH}_4\text{)}_2\text{Fe(SO}_4\text{)}_2 \cdot 6\text{H}_2\text{O} \] This indicates that Mohr's salt contains two ammonium ions, one ferrous ion, two sulfate ions, and six water molecules of crystallization. ### Step 3: Analyze the Given Options Now, let’s analyze the provided options to find the correct representation of Mohr's salt: 1. **Option A**: Fe S₂.7 H₂O - This is incorrect as it does not represent Mohr's salt. 2. **Option B**: Fe SO₄ (NH₄)₂ SO₄ · 6 H₂O - This can be rearranged to show that it contains the necessary components of Mohr's salt. 3. **Option C**: Fe₂(SO₄)₃ (NH₄)₂ SO₄ · 24 H₂O - This is incorrect as it represents a different compound. 4. **Option D**: K₂SO₄ · Fe₂(SO₄)₃ · 24 H₂O - This is also incorrect as it does not represent Mohr's salt. ### Step 4: Conclusion After analyzing the options, the correct representation of Mohr's salt is given in **Option B**: \[ \text{(NH}_4\text{)}_2\text{Fe(SO}_4\text{)}_2 \cdot 6\text{H}_2\text{O} \] ### Final Answer Mohr's salt is represented by the formula: \[ \text{(NH}_4\text{)}_2\text{Fe(SO}_4\text{)}_2 \cdot 6\text{H}_2\text{O} \] ---
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