`FeCl_(3)+NH_(3)(excess) to Fe(OH)_(3)darr`

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Answer

To solve the given reaction of FeCl₃ with excess NH₃ to form Fe(OH)₃, we can follow these steps:

### Step 1: Identify the Reactants
The reactants in this reaction are:
- Iron(III) chloride (FeCl₃)
- Ammonia (NH₃) in excess

### Step 2: Understand the Reaction
When ammonia is added to an iron(III) chloride solution, it reacts with the iron ions (Fe³⁺) to form iron(III) hydroxide (Fe(OH)₃). This is a double displacement reaction where the chloride ions (Cl⁻) are replaced by hydroxide ions (OH⁻) from ammonia.

### Step 3: Write the Balanced Chemical Equation
The balanced chemical equation for the reaction is:
\[ \text{FeCl}_3 + 3\text{NH}_3 + 3\text{H}_2\text{O} \rightarrow \text{Fe(OH)}_3 \downarrow + 3\text{NH}_4\text{Cl} \]

### Step 4: Identify the Product
The product formed is iron(III) hydroxide (Fe(OH)₃), which is a precipitate. This precipitate is known to have a red-brown color.

### Step 5: Conclusion
When FeCl₃ reacts with excess NH₃, it produces a red-brown precipitate of Fe(OH)₃.

### Final Answer
The reaction of FeCl₃ with excess NH₃ results in the formation of a red-brown precipitate of Fe(OH)₃.

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