`Cl_2O_6` is the mixed anhydride of 

Options

A. `HOCl and HClO_2`
B. `HClO_2 and HClO_3`
C. `HClO_3 and HClO_4`
D. `HClO and HClO_3`

Answer

To determine what `Cl_2O_6` (dichloroexoxide) is the mixed anhydride of, we can analyze the chemical composition and the reactions involved. Here’s a step-by-step solution:

### Step 1: Understand the term "mixed anhydride"
An anhydride is a compound that can be derived from an acid by the removal of water. A mixed anhydride is formed from two different acids.

### Step 2: Identify the acids involved
In this case, we need to identify which two acids can combine to form `Cl_2O_6`. The two acids we are considering are:
- **HClO3** (Chloric acid)
- **HClO4** (Perchloric acid)

### Step 3: Write the reaction
We can write the reaction that shows how `Cl_2O_6` is formed from these two acids:
\[ HClO3 + HClO4 \rightarrow Cl_2O_6 + H_2O \]
This equation indicates that when chloric acid and perchloric acid react, they form dichloroexoxide and water.

### Step 4: Conclusion
From the reaction, we conclude that `Cl_2O_6` is the mixed anhydride of **HClO3** and **HClO4**.

### Final Answer
Therefore, the correct answer is that `Cl_2O_6` is the mixed anhydride of **HClO3 and HClO4**.

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