`CIO_(3)` is the mixed anhydride of :

Options

A. `HCIO_(2)` and `HCIO_(3)`
B. `HCIO_(3)` and `HCIO_(4)`
C. `HCIO_(2)` and `HCIO_(4)`
D. `HCIO_(2)` and `HCIO_(3)`

Answer

To determine what ClO3 is the mixed anhydride of, we need to understand the concept of anhydrides and how they relate to acids.

### Step-by-Step Solution:

1. **Understanding Anhydrides**:
- An anhydride is formed by the removal of a water molecule (H2O) from an acid.
- In this case, we are looking for a mixed anhydride, which means it is derived from two different acids.

2. **Identifying the Acids**:
- We know that ClO3 is related to chloric acid (HClO3) and perchloric acid (HClO4).
- The chemical formulas for these acids are:
- Chloric acid: HClO3
- Perchloric acid: HClO4

3. **Combining the Acids**:
- When we combine two moles of ClO3 (from HClO3 and HClO4) and remove a water molecule, we can derive the mixed anhydride.
- The reaction can be represented as:
\[ 2 \text{HClO3} + \text{H2O} \rightarrow \text{HClO3} + \text{HClO4} \]

4. **Formation of the Mixed Anhydride**:
- By removing the water molecule from the combination of these two acids, we can represent the mixed anhydride as:
\[ \text{Cl2O6} \text{ or } 2 \text{ClO3} \]
- Thus, ClO3 is the mixed anhydride of chloric acid (HClO3) and perchloric acid (HClO4).

5. **Conclusion**:
- Therefore, the correct answer is that ClO3 is the mixed anhydride of HClO3 (chloric acid) and HClO4 (perchloric acid).

### Final Answer:
ClO3 is the mixed anhydride of HClO3 and HClO4.

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