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Topic: Need help with writing compuonds.  (Read 7599 times)

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Silver_steve246

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Need help with writing compuonds.
« on: December 07, 2005, 11:16:36 PM »
      I am trying to learn how to write ionic and molecular compounds, but I am not sure if i am doing this right...I have AgN3 as silver nitride.  Is that right? And I have a couple more.  I have OCl as Monoxide monochloride, want to know if either of them are  right.  Last I have NaSiO3 as sodium silicate, I would like to know if either of those are right too.
      I would ask my teacher about this stuff but we are not going to start learning this stuff for another year when i get to chemestry classes.  I have been getting all my info from websites about it.
« Last Edit: December 08, 2005, 10:28:50 AM by Silver_steve246 »

Offline Mitch

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Re:new to chemistry
« Reply #1 on: December 07, 2005, 11:18:05 PM »
You need something like Silver(II) blah or Silver(III) blah for the first one.
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Silver_steve246

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Re: Need help with writing compounds.
« Reply #2 on: December 07, 2005, 11:22:23 PM »
so for the first one you mean like Silver (III) nitride? And wouldn't that mean that the symbol for it would be AgN and not AgN3?
« Last Edit: December 08, 2005, 10:29:56 AM by Silver_steve246 »

thetomatohead

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Re:Need help with writing compuonds.
« Reply #3 on: December 09, 2005, 12:37:18 AM »
ClO, not OCl

Skyline

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Re:Need help with writing compuonds.
« Reply #4 on: December 09, 2005, 02:03:50 AM »
you have a great start on writing the molecular equation
i'm sure your teacher will be really impress to know that you are learning this on your own  ;D

for the 1st compound: silver nitride
the chemical formula is: Ag(III)N
yups... not AgN3, because you do not have 3 Nitrogens
there is only 1 silver and 1 nitrogen total
the roman numeral III stands for the charge on Ag
since it is a transition metal, it can be written in certain ways due to the electron configuration.  i'm not too good at explaining this, but i'm sure your teacher will go into the detail of how silver can be in the stage of AgI, AgII and AgIII in your chemistry class.

for the 2nd compound: monoxide monochloride
yups! you are correct with the chemical formula
just one tiny alternation, it should be written as ClO-
there is a general trend that compounds are arranged, usually cation goes first (on the left) and anion goes after it (towards the right side of the formula) nevertheless, both Chloride and Oxygen are anion in this case.  It takes some experience to know the order, but i'm sure you'll the trend as you pratice more  ;)
in addition, there is a negative sign next to the O because this molecule is negatively charged.  meaning that it has one more electron that started with to fullfill the octate rule.  
The octet rule is a simple chemical theory that states that atoms tend to combine in such a way that they each have eight electrons in their valence shells
since Cl has 7 electrons, and O has 6 electrons, Cl+O has a total of 13 electron
but when we draw out the structure and fulfill the octet rule, it comes out to be a total of 14 electrons, therefore we put a "-" sign to represent the extra electron.

for the 3rd compound: sodium silicate
the chemical formula is: Na2SiO3
you are really close  :)
since SiO3 has a -2 charge, and Na has a + charge
you will need 2 Na to balance the silicate (SiO3)2-
therefore the end formula is: Na2SiO3

does my explaination help??
I hope I didn't confuse you more.  :P
I don't know how much chemistry did you have before
so some of the terms might not make sense to you
feel free to e-mail me if you want to learn more about writing a chemical formula
writing chemical formula is not hard, it just take a few practices, and I can see that you are getting a great start.

good work!!!!

Offline Alberto_Kravina

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Re:Need help with writing compuonds.
« Reply #5 on: December 09, 2005, 08:34:40 AM »
Does Silver(III) exsist under normal conditions? I thought that the highest ox-num of silver is +2, but check me on this...

Offline Borek

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Silver_steve246

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Re:Need help with writing compuonds.
« Reply #7 on: December 09, 2005, 05:20:52 PM »
Thanks for the help everyone...Some of it was hard to understand but i will look it up and I will post again if i need anymore help. ;D

Offline Curry

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Re:new to chemistry
« Reply #8 on: December 10, 2005, 12:46:42 PM »
You need something like Silver(II) blah or Silver(III) blah for the first one.

I was under the impression that Ag only had a + ion because it isn't really counted as a transition metal.

thetomatohead

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Re:new to chemistry
« Reply #9 on: December 10, 2005, 02:06:36 PM »
I was under the impression that Ag only had a + ion because it isn't really counted as a transition metal.

isn't really counted? transition metals are loosely defined as elements from the d-block. but if you want to be specific, they are the elements that can form at least one ion with a partial filled d-shell of e-.

http://en.wikipedia.org/wiki/Transition_metals
the 2+ oxidation state of Ag is a less common one, but it still exists

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