The oxidation number of iodine in the iodate ion (IO -3) is

Assessment: WAEC SSCE - Chemistry - 2006 (Objective) Subject: Chemistry

Question 1 Report

The oxidation number of iodine in the iodate ion (IO -3) is
Answer Details
In the iodate ion (IO3-), the overall charge of the ion is -1. Since oxygen atoms typically have an oxidation state of -2 in ionic compounds, and there are three oxygen atoms in the ion, their total charge contribution is -6. Therefore, the oxidation state of iodine can be calculated by equating the total charge of the ion (-1) with the sum of the oxidation states of iodine and oxygen (-6 + x, where x is the oxidation state of iodine). Solving for x, we get: -6 + x = -1 x = +5 Therefore, the oxidation state of iodine in the iodate ion (IO3-) is +5.
Read lesson note on Oxidation And Reduction (JAMB)
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