The Correct Name For HCIO 2 Is Chlorous Acid Chloric Acid Hypochlorous Acid Perchloric Acid Hypychloric Acid
The correct answer and explanation is :
The correct name for HClO₂ is Chlorous Acid.
Explanation:
The nomenclature of chemical compounds follows certain rules established by IUPAC (International Union of Pure and Applied Chemistry). In this case, we are dealing with an acid formed from chlorine (Cl) and oxygen (O), known as a chlorine oxyacid. The general formula for chlorine oxyacids is HClOₙ, where n refers to the number of oxygen atoms bonded to chlorine.
To understand the correct name for HClO₂, we need to break down the structure of the compound and apply the rules of naming chlorine oxyacids:
- Chlorine and Oxidation States: Chlorine can exist in multiple oxidation states, ranging from -1 to +7. The oxidation state of chlorine in HClO₂ is +3.
- Naming Chlorine Oxyacids: The naming of oxyacids typically follows a pattern based on the oxidation state of the central element (in this case, chlorine). The key to naming lies in the number of oxygen atoms present:
- Chloric Acid (HClO₃): Chlorine is in the +5 oxidation state.
- Perchloric Acid (HClO₄): Chlorine is in the +7 oxidation state.
- Hypochlorous Acid (HClO): Chlorine is in the +1 oxidation state.
- Chlorous Acid (HClO₂): Chlorine is in the +3 oxidation state (this is the compound in question).
- Acid Naming Conventions:
- When chlorine is in the +3 oxidation state and two oxygen atoms are present, the compound is named Chlorous Acid.
- The “ous” suffix is used for acids where the chlorine is in a lower oxidation state (compared to “ic” acids, like Chloric Acid, where chlorine has a +5 oxidation state).
Therefore, HClO₂ is named Chlorous Acid, and it is a weak, corrosive acid that can be produced by chlorinating water. It is less commonly encountered in comparison to other chlorine-based acids like chloric acid or hypochlorous acid.
In summary, Chlorous Acid is the correct name for HClO₂, as per IUPAC nomenclature for chlorine oxyacids.