The given reaction: `2FeCl_3+SnCl_2 to 2FeCl_2+SnCl_4` is an example of:

Options

A. First order reactions
B. Second order reaction
C. Third order reactions
D. None of these

Answer

To determine the order of the reaction given by the equation:

\[ 2FeCl_3 + SnCl_2 \rightarrow 2FeCl_2 + SnCl_4 \]

we will follow these steps:

### Step 1: Identify the reactants and their coefficients
The reactants in the reaction are \( FeCl_3 \) and \( SnCl_2 \). The coefficients in front of these reactants are 2 for \( FeCl_3 \) and 1 for \( SnCl_2 \).

### Step 2: Write the rate expression
The rate of a reaction can be expressed as:

\[ \text{Rate} = k [\text{Reactants}]^{\text{coefficients}} \]

For our reaction, the rate expression can be written as:

\[ \text{Rate} = k [FeCl_3]^2 [SnCl_2]^1 \]

### Step 3: Determine the order with respect to each reactant
- The order with respect to \( FeCl_3 \) is equal to its coefficient, which is 2.
- The order with respect to \( SnCl_2 \) is equal to its coefficient, which is 1.

### Step 4: Calculate the overall order of the reaction
The overall order of the reaction is the sum of the orders with respect to each reactant:

\[ \text{Overall order} = \text{Order with respect to } FeCl_3 + \text{Order with respect to } SnCl_2 \]
\[ \text{Overall order} = 2 + 1 = 3 \]

### Conclusion
Thus, the given reaction is an example of a **third-order reaction**.

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