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Author Topic: Roman Numeral Compound Names.  (Read 5667 times)

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350chev

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Roman Numeral Compound Names.
« on: October 08, 2009, 07:32:17 PM »

I have been having trouble getting used to the webassign system and the roman numeral system as I have never used it before. I am curious as to how to apply the roman numeral system to naming compounds.

My given example is Copper(II) chloride for CuCl2

Now what I would like to know is the procedure for how to properly name them. I was wanting to think that the roman numerals referred to a balance of charges so for Sr3N2 it would need neutral charge with strontium receiving the roman numerals. However, that does not seem to work. I also stated that it was tristrontium nitride but received the red X of doom. I need to figure this out for: Sr3N2 and H2SO4. Hopefully it is easier than I am making it out to be... Unfortunately that happens often :(

Thanks in advance!
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Dan

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Re: Roman Numeral Compound Names.
« Reply #1 on: October 09, 2009, 01:56:50 AM »

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350chev

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Re: Roman Numeral Compound Names.
« Reply #2 on: October 09, 2009, 11:29:44 AM »

Start here:

http://en.wikipedia.org/wiki/Oxidation_number

Ok I figured out how to "cross reference" the charges and use them but the webassign is telling me that Sr3N2 is not strontium(II) nitride?
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Dan

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Re: Roman Numeral Compound Names.
« Reply #3 on: October 10, 2009, 03:51:26 AM »

That's odd... It is strontium nitride, and the oxidation number of Sr is II, so I see no reason why you are getting it marked wrong...
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sjb

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Re: Roman Numeral Compound Names.
« Reply #4 on: October 10, 2009, 04:38:27 AM »

That's odd... It is strontium nitride, and the oxidation number of Sr is II, so I see no reason why you are getting it marked wrong...

Could it be something along the lines of the fact that Sr doesn't have any other (common) oxidation states? Unlike, say, iron or vanadium?
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350chev

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Re: Roman Numeral Compound Names.
« Reply #5 on: October 10, 2009, 12:31:40 PM »

That's odd... It is strontium nitride, and the oxidation number of Sr is II, so I see no reason why you are getting it marked wrong...

Could it be something along the lines of the fact that Sr doesn't have any other (common) oxidation states? Unlike, say, iron or vanadium?


I have one try left and no idea which way to go :(
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350chev

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Re: Roman Numeral Compound Names.
« Reply #6 on: October 10, 2009, 05:07:21 PM »

Any ideas guys? Its the last thing on my homework?
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sjb

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Re: Roman Numeral Compound Names.
« Reply #7 on: October 10, 2009, 11:19:22 PM »

Well, the fact that sulfuric acid (as opposed to sulfuric (VI) acid) has been accepted for your last compound would lead me to try strontium nitride.

Sulfuric (IV) acid exists as well, though I've never seen it named as such - sulfurous acid H2SO3. I have seen nitrous (HNO2) referred to as nitric (III), and nitric (HNO3) as nitric (V) acids. which is the basis of my assertion here.

Do any of your peers have Sr3N2 in their selection, have they named it correctly?
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