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<div class="moz-cite-prefix">On 05/30/2016 11:32 AM, wrote:<br>
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<p>Dr. Pounds, </p>
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<p>As I was working though some of the worksheets you emailed us
I became confused about two of the compounds. On the worksheet
it names Sc(OH)3 as scandium hydroxide, but I do not
understand why it is not scandium (III) hydroxide? Also it
states that Cu(NO2)2 is copper (I) nitrite, but I thought it
would be copper (II) nitrite? Could you please explain to me
why these are the correct names and how to get the correct
name?</p>
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<p>Thank you, </p>
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As far as Sc(OH)<sub>3</sub> goes, it could be Scandium (III)
hydroxide. It just turns out that the other two oxidation states
of scandium are so rare that they are never really considered --
so scandium hydroxide is normally acceptable. I will try to pick
metals that you know either have a well know, and generally fixed,
oxidation state or metals that you know have multiple oxidation
states. You might want to take a look at figure 2.14 in your text.
<br>
<br>
Cu(NO<sub>2</sub>)<sub>2</sub> is copper (II) nitrite -- that is a
misprint in the solutions. Copper (I) nitrite would be CuNO<sub>2</sub><br>
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<pre class="moz-signature" cols="72">--
Andrew J. Pounds, Ph.D. (<a class="moz-txt-link-abbreviated" href="mailto:pounds_aj@mercer.edu">pounds_aj@mercer.edu</a>)
Professor of Chemistry and Computer Science
Mercer University, Macon, GA 31207 (478) 301-5627
<a class="moz-txt-link-freetext" href="http://faculty.mercer.edu/pounds_aj">http://faculty.mercer.edu/pounds_aj</a>
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