Naming Oxoanions/Oxoacids, which ion to base off of?

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The discussion centers on the naming of chemical compounds, specifically KClO, which is identified as Potassium Hypochlorite due to its relation to the most common chlorine oxyanion, ClO3 (chlorate). The question arises about the rationale behind not using ClO2 (chlorite) as a basis for naming, leading to confusion about how to determine the most common ion among various oxyanions. The conversation highlights the challenge of recognizing and memorizing numerous oxyanions, suggesting that there may be too many to easily learn. Understanding the hierarchy and commonality of these ions is essential for accurate chemical nomenclature.
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For example: If they gave you KClO and asked you to name it...

The answer is Potassium Hypochlorite, because you base it off of the loss of two oxygen atoms from the most common chlorine ion (ClO3). My question is, why can't I base it off of Clorite (ClO2), so that the name of KClO would then be Potassium Chlorite? (without the hyper). How do you know that ClO3 is the one to use and not ClO2?
 
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You are really asking, "How do I know what is the most common ion when they are all strangers to me?"

How many oxyanions are there? Too many to 'get to know'?
 

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