Question

What is the correct name for the polyatomic ion IO₃- and its conjugate acid HIO₃?

A) Iodate ion and Iodic acid
B) Iodite ion and Iodous acid
C) Iodine ion and Hydriodic acid
D) Iodide ion and Iodous acid

Answer 1

The correct name for the polyatomic ion IO₃⁻ is the iodate ion, and its conjugate acid HIO₃ is known as iodic acid.

Step-by-step explanation:

The correct name for the polyatomic ion IO₃⁻ is iodate ion, and its conjugate acid HIO₃ is called iodic acid. Therefore, the correct answer is A) Iodate ion and Iodic acid.

This naming system is based on the fact that the suffix '-ate' is used for a polyatomic ion that is part of a series with a higher number of oxygen atoms, and when hydrogen is added to form an acid, the resulting name is the stem of the anion plus '-ic acid'.