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Topic: Roman Numeral Compound Names.  (Read 12165 times)

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Offline 350chev

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Roman Numeral Compound Names.
« on: October 09, 2009, 01:32:17 AM »
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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Offline Dan

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Re: Roman Numeral Compound Names.
« Reply #1 on: October 09, 2009, 07:56:50 AM »
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Offline 350chev

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Re: Roman Numeral Compound Names.
« Reply #2 on: October 09, 2009, 05:29:44 PM »
Quote from: Dan on October 09, 2009, 07:56:50 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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Offline Dan

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Re: Roman Numeral Compound Names.
« Reply #3 on: October 10, 2009, 09:51:26 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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Offline sjb

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Re: Roman Numeral Compound Names.
« Reply #4 on: October 10, 2009, 10:38:27 AM »
Quote from: Dan on October 10, 2009, 09:51:26 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...

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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Offline 350chev

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Re: Roman Numeral Compound Names.
« Reply #5 on: October 10, 2009, 06:31:40 PM »
Quote from: sjb on October 10, 2009, 10:38:27 AM
Quote from: Dan on October 10, 2009, 09:51:26 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...

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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Offline 350chev

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Re: Roman Numeral Compound Names.
« Reply #6 on: October 10, 2009, 11:07:21 PM »
Any ideas guys? Its the last thing on my homework?
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Offline sjb

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Re: Roman Numeral Compound Names.
« Reply #7 on: October 11, 2009, 05:19:22 AM »
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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