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Multiple Choice
Give the systematic name for the following polyatomic ion. CO22–
A
hypocarbonate
B
carbonate
C
carbonite
D
carbonide
E
carbide
Verified step by step guidance
1
Identify the chemical formula given in the problem: CO2^{2-}. This represents a polyatomic ion.
Recognize that the ion contains carbon and oxygen. The presence of oxygen typically indicates an oxyanion.
Understand the naming convention for oxyanions: The suffix '-ate' is used for the most common or typical oxyanion, while '-ite' is used for an oxyanion with one fewer oxygen atom.
Compare the given options with the naming conventions: 'Carbonate' (CO3^{2-}) is the common oxyanion, while 'Carbonite' (CO2^{2-}) has one fewer oxygen atom.
Select the name that matches the formula CO2^{2-} based on the naming conventions: 'Carbonite' is the correct name for the ion with one fewer oxygen atom than carbonate.