What would be the name of ClO3- if the name of HClO3 is chloric acid?

What would be the name of ClO3- if the name of HClO3 is chloric acid?

• A. Chlorate
• B. Chlorite
• C. Perchlorate
• D. Hypochlorite

Answer: (A)

The main idea is how naming oxoanions of chlorine works and how acids relate to their conjugate bases. When you have chloric acid, HClO3, the ion that forms after you remove the H+ is ClO3−. For chlorine oxoanions, the -ic acid form corresponds to the -ate ion form. So HClO3 (chloric acid) maps to the chlorate ion, ClO3−. That’s why the name of ClO3− is chlorate. The other options reflect different chlorine oxyanions: chlorous acid (HClO2) gives chlorite (ClO2−); hypochlorous acid (HClO) gives hypochlorite (ClO−); perchloric acid (HClO4) gives perchlorate (ClO4−).

The main idea is how naming oxoanions of chlorine works and how acids relate to their conjugate bases. When you have chloric acid, HClO3, the ion that forms after you remove the H+ is ClO3−. For chlorine oxoanions, the -ic acid form corresponds to the -ate ion form. So HClO3 (chloric acid) maps to the chlorate ion, ClO3−.

That’s why the name of ClO3− is chlorate. The other options reflect different chlorine oxyanions: chlorous acid (HClO2) gives chlorite (ClO2−); hypochlorous acid (HClO) gives hypochlorite (ClO−); perchloric acid (HClO4) gives perchlorate (ClO4−).