Problem: Part C. What is the name of the acid whose formula is H2CO3? Spell out the full name of the acid.Naming oxoacidsOxoacids contain an oxygen atom in the anion. To name them, again, start with the name of the anion when naming acids. Polyatomic anions are named according to the following rules:If an element can only form two oxyanions then the one with the least amount of oxygens is given the ending ite. The one containing the most oxygens is given the ending ate. Elements that can form four polyatomic oxyanions use prefixes in addition to the ite and ate endings. The oxyanion with the least amount of oxygens is given the prefix hypo and the ending ite (i.e., ClO− is hypochlorite). The oxyanion with the second least amount of oxygens is simply given the ite ending (i.e., ClO2− is chlorite). The oxyanion with the second most amount of oxygens is simply given the ate ending (i.e., ClO3− is chlorate). Finally, the oxyanion with the most amount of oxygens is given the prefix per and the ending ate (i.e., ClO4− is perchlorate). When naming the acid of an oxoanion the endings of the anion are modified as follows: ate changes to ic (retain prefixes) and ite changes to ous (retain prefixes). The word acid is added following the new name of the anion to complete the name of the acid.

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Part C. What is the name of the acid whose formula is H2CO3

Spell out the full name of the acid.


Naming oxoacids

Oxoacids contain an oxygen atom in the anion. To name them, again, start with the name of the anion when naming acids. Polyatomic anions are named according to the following rules:

  • If an element can only form two oxyanions then the one with the least amount of oxygens is given the ending ite. The one containing the most oxygens is given the ending ate
  • Elements that can form four polyatomic oxyanions use prefixes in addition to the ite and ate endings. 
    • The oxyanion with the least amount of oxygens is given the prefix hypo and the ending ite (i.e., ClO is hypochlorite). 
    • The oxyanion with the second least amount of oxygens is simply given the ite ending (i.e., ClO2 is chlorite). 
    • The oxyanion with the second most amount of oxygens is simply given the ate ending (i.e., ClO3 is chlorate). 
    • Finally, the oxyanion with the most amount of oxygens is given the prefix per and the ending ate (i.e., ClO4 is perchlorate). 

When naming the acid of an oxoanion the endings of the anion are modified as follows: 

  • ate changes to ic (retain prefixes) and 
  • ite changes to ous (retain prefixes). 

The word acid is added following the new name of the anion to complete the name of the acid.

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