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Topic: Are these formula's correct?  (Read 18720 times)

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Offline jennielynn_1980

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Are these formula's correct?
« on: May 30, 2006, 02:21:32 PM »
Could someone please check these and tell me if they are correct?  Thanks in advance! :)  I was given the name and had to come up with the formula:

a) HCL - hydrochloric acid
b) HNO2 - nitrous acid
c) H2SO4 - sulphuric acid
d) HBrO3 - bromic acid
e) SrO - strontium oxide
f) RbClO2 - rubidium chlorite
g) MnI2OH - manganese (II) iodite
h) WF6 - tungsten hexafluroide
i) HFO - hypofluorous acid
j) NH4OH - ammonium hydroxide
k) H2S - hydrosulphuric acid
l) NaO2 - sodium peroxide
m) P4 - phosphorus
n) O2 - oxygen gas
o) K2BrO4 - potassium perbromate

Offline Borek

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Re: Are these formula's correct?
« Reply #1 on: May 30, 2006, 02:28:29 PM »
g) MnI2OH - manganese (II) iodite
k) H2S - hydrosulphuric acid
l) NaO2 - sodium peroxide
o) K2BrO4 - potassium perbromate

Something wrong with these (which doesn't mean all others are OK - English nomenclature is not a thing I want to talk about).

g - are you sure about formula? If formula is correct, name is wrong.
k - hydrogen sulfide IMHO.
l - superoxide, peroxide is Na2O2
o - are you sure about formula? AFAIK there is no such compound.

EDIT: Oops, I misread your post - I thought you had to name compounds with given names.
« Last Edit: May 30, 2006, 02:48:16 PM by Borek »
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Offline Will

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Re: Are these formula's correct?
« Reply #2 on: May 30, 2006, 02:34:47 PM »
Thats really a very good atempt at those formulas.
One small error is that hydrochloric acid is HCl, but I'm sure HCL was just a typo!
You got rubidium chlorite right, but manganese (II) iodite incorrect. (iodite ion is (IO2)-)
I would also write hypofluorous acid as HOF rather than HFO since the bonding in it is F-O-H
Hydrosulfuric acid is right, but I think it has to be aqueous for H2S to be considered acidic.
The peroxide ion has a charge of 2-, so sodium peroxide needs to be corrected.
Remember that bromine usually has odd-number oxidation states, so the perbromate ion has a charge of 1-.
« Last Edit: May 30, 2006, 02:39:49 PM by will17 »

Offline constant thinker

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Re: Are these formula's correct?
« Reply #3 on: May 30, 2006, 05:43:29 PM »
This website may help out a bit in naming.
http://en.wikipedia.org/wiki/Polyatomic_ion

It has a list of polyatomic ions. Watch capitalization with a). It's HCl not HCL. I'm sure it's just a typo, but some teachers/professors are probably anal about those kinds of things.
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Offline jennielynn_1980

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Re: Are these formula's correct?
« Reply #4 on: May 31, 2006, 11:34:02 AM »
Okay, so are they right now?

g) Mn(IO2)2 (manganese iodite) Or am I missing an H atom?
l) Na2O2 (sodium peroxide)
o) KBrO4 (potassium perbromate) Or is this one KBrO?

btw the HCL was a typo :) but thanks for pointing it out because I would've submitted it that way.

Offline Will

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Re: Are these formula's correct?
« Reply #5 on: May 31, 2006, 12:02:39 PM »
g) Mn(IO2)2 (manganese iodite)
l) Na2O2 (sodium peroxide)
o) KBrO4 (potassium perbromate)

Perfect! Very good ;). (the "per" prefix in the name means that its got 4 of something in it (I think!))

Offline Albert

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Re: Are these formula's correct?
« Reply #6 on: May 31, 2006, 12:11:04 PM »
(the "per" prefix in the name means that its got 4 of something in it (I think!))

per means you're considering a compound where an atom has its highest oxidation number.

Offline Will

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Re: Are these formula's correct?
« Reply #7 on: May 31, 2006, 12:37:20 PM »
(the "per" prefix in the name means that its got 4 of something in it (I think!))

per means you're considering a compound where an atom has its highest oxidation number.

I'm such a moron sometimes- sorry. Of course I'm wrong- theres peroxide, persulfide, persulfate, perchromate etc.
I think I said that because I was thinking of permangante :(.

Offline jennielynn_1980

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Re: Are these formula's correct?
« Reply #8 on: May 31, 2006, 12:48:57 PM »
Finally I got something right! ;D

Can I post a few more for someone to check?  I really appreciate this!  In these ones, I was given the formula and then I had to name it:

a) ZnI2 = zinc iodide
b) BrF = bromine fluoride
c) H2O2 = hydrogen peroxide
d) FeSO3 = iron sulfite
e) CaH2 = calcium hydride
f) BaHPO3 = barriuim phosphate
g) CuNO3 = cuprous nitrate
h) MnO2 = manganese dioxide
i) NH4OH = ammonium hydroxide
j) AgIO = silver iodite
k) SO2 = sulfur dioxide
l) Li2O = lithium oxide

Offline Will

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Re: Are these formula's correct?
« Reply #9 on: May 31, 2006, 01:04:40 PM »
d) FeSO3 = iron sulfite
f) BaHPO3 = barriuim phosphate
g) CuNO3 = cuprous nitrate
h) MnO2 = manganese dioxide
j) AgIO = silver iodite

You have to quote the oxidation numbers of the transition metals normally, so for FeSO3 it would be iron(II) sulfite
BaHPO3 is barium phosphonate
CuNO3 is copper(I) nitrate
MnO2 is manganese(IV) oxide, although I think manganese dioxide can also be used in the same way that titanium dioxide is.
I think AgIO is silver(I) hypoiodite.

Its a bit hard to give hints for these, so I just corrected them ;).

I think all the rest are right though. :)

Offline jennielynn_1980

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Re: Are these formula's correct?
« Reply #10 on: May 31, 2006, 01:11:14 PM »
Is cuprous nitrate the same as copper (I) nitrate but I just used the old naming system?  Just wondering if I was totally wrong in the name or just outdated :)

Also, I haven't heard of phosphonate...where does that name come from?  Obviously phosphorus but what else?

Offline Albert

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Re: Are these formula's correct?
« Reply #11 on: May 31, 2006, 01:13:22 PM »
I'd say the latter. However, it's good to be a little bit old-fashioned, sometimes.  :)

Offline Will

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Re: Are these formula's correct?
« Reply #12 on: May 31, 2006, 01:14:13 PM »
Is cuprous nitrate the same as copper (I) nitrate but I just used the old naming system?  Just wondering if I was totally wrong in the name or just outdated :)

Just outdated! They mean exactly the same thing, but nowadays I think that a majority of the time you should include the oxidation state of the transition metal.

Albert beat me to it :D.

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