Chemical formula of a molecular compound represents the actual number of atoms of different elements present in one molecule of the compound. With the help of symbols and valencies or charges, a formula can be made. First write the symbol such as positive ion to the left and negative ion to the right and then criss cross the valencies or charges . Thus in this way we can write a chemical formula.
The charge on Cl in `FeCl_3` is

Options

A. `+1`
B. `-1`
C. `+3`
D. `-3`

Explanation

To determine the charge on chlorine in the compound FeCl₃, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the ions in the compound**:
- The compound FeCl₃ consists of iron (Fe) and chlorine (Cl) ions.
- Iron typically has a charge of +3 when it forms ions, so we can denote it as Fe³⁺.

2. **Understand the overall charge neutrality**:
- In a compound, the total positive charge must balance the total negative charge to ensure that the compound is neutral overall.

3. **Determine the number of chlorine atoms**:
- The formula FeCl₃ indicates that there are three chlorine atoms present in the compound.

4. **Assign a variable charge to chlorine**:
- Let’s denote the charge of each chlorine atom as Cl⁻ (which is a common charge for chlorine in ionic compounds).

5. **Calculate the total negative charge from chlorine**:
- Since there are three chlorine atoms, the total negative charge contributed by chlorine will be:
\[ \text{Total negative charge} = 3 \times (-1) = -3 \]

6. **Set up the equation for charge neutrality**:
- The total positive charge from iron (Fe³⁺) is +3. Therefore, we can set up the equation:
\[ \text{Total positive charge} + \text{Total negative charge} = 0 \]
\[ +3 + (-3) = 0 \]

7. **Conclusion**:
- Since the charges balance out, we confirm that the charge on each chlorine atom in FeCl₃ is -1.

### Final Answer:
The charge on Cl in FeCl₃ is -1.

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