The chemical acid anhydride corresponding to HCIO4 is_________________?
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Answer: D. Cl2O7
Explanation
Dichlorine heptoxide is the chemical acid anhydride corresponding to perchloric acid. Reacting this chlorine oxide with water generates perchloric acid without changing oxidation states. It represents the highest oxide of chlorine where the halogen exhibits a plus seven oxidation state. Acid anhydrides are nonmetal oxides that react with water to form corresponding oxyacids. Perchloric acid is a strong mineral acid with the chemical formula HClO4. Halogen oxides often exhibit high reactivity and can be powerful oxidizing agents.
Understanding acid anhydrides helps explain the acidic behavior of nonmetal oxides in environmental chemistry. Perchloric acid is used extensively in analytical laboratories and chemical synthesis procedures. Knowledge of anhydride formation is crucial for mastering inorganic reaction chemistry. Cl2O is the anhydride corresponding to hypochlorous acid rather than perchloric acid. Cl2O6 is an intermediate chlorine oxide associated with different chlorate chemistry pathways. ClO2 is chlorine dioxide, which is a neutral bleaching agent rather than perchloric anhydride.
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