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I am working through Zumdahl Introductory Chemistry. I've just completed Chapter 5 on nomenclature.  I must be missing something. I don’t see what to do with these.  The book has a chart of common poyatomic ions, but  Br O3

And OI isn’t on the chart. 

 

 

Question 40 part c and d 

 

Name each of the following acids

 

c) HBrO3

d) HOI

 

 

Working backwards from the answer of bromic acid it looks like the BrO3      must be an polyatomic Ion called bromate but I can't see that the book taught how to name that. The book gave a list of polyatomic acids and said to memorize them, but that one isn't on the list.

 

d) the answer to HOI is hypoiodous acid.   So I guess OI is called hypoiodite? 

 

Should we have been able to figure this out or should the polyatomic ion have been given to us?

 

Thanks,

Kendall 

 

 

 

 

 

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If you were given another with the same atoms, you might be able to work it out, since the names are in order.

For example, if the table had iodate IO3-, then you could work out that IO- was hypoiodite. Or if you were given bromite BrO2-, then you could see that BrO3-​ was bromate.

But I'm pretty sure that you have to have at least one named polyatomic with the same atoms to work from.

 

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Page 67 of Zumdahl's chemistry (purple) book

 

"Acid Anion Name

HClO4 Perchlorate Perchloric acid

HClO3 Chlorate Chloric acid

HClO2 Chlorite. Chlorous acid

HClO Hypochlorite Hypochlorous acid"

 

I would have just modified accordingly for all group 7 elements.

 

A teacher did compiled a 5 page list. The ones you are looking for are on page 3 https://muchincollegeprep.wikispaces.com/file/view/Polyatomic%20Ions%20List.pdf/585222495/Polyatomic%20Ions%20List.pdf

Edited by Arcadia
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Thank you! I noticed on that document that Oxygen was listed last(HIO), which is what I expected rather than the HOI.  Further research shows that hypoiodic acid is known both as HOI and HIO, though HIO seems to be used more. 

 

Following the pattern for the group works for Br and I.  Thanks. 

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