complex ion

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Dahriel Aron 3A
Posts: 60
Joined: Fri Sep 25, 2015 3:00 am

complex ion

Postby Dahriel Aron 3A » Sat Nov 14, 2015 3:26 pm

On page 49 of the green workbook number 9 it says:
name the complex ion
[Cu(NH3)CL5] 3-
and the answer is either amminepentachlorocuprate (II) ion or amminepentachlorocopper(II) ion
why are there 2 possible answers? Is it because there is no counter ion?

Christine Burke 1G
Posts: 27
Joined: Fri Sep 25, 2015 3:00 am

Re: complex ion

Postby Christine Burke 1G » Sat Nov 14, 2015 8:36 pm

I'm not positive, but cuprate is the latin version of copper like ferrate is for iron. So I think the answer is just allowing leniency for people who didn't know the latin word for copper is cuprate. If you look at the two correct answers, the only difference is copper and cuprate.

Christine Burke 1G
Posts: 27
Joined: Fri Sep 25, 2015 3:00 am

Re: complex ion

Postby Christine Burke 1G » Sat Nov 14, 2015 8:38 pm

Also, this ion is negatively charged. Remember that when an ion has a negative charge we add -ate to the end. Cobalt becomes cobaltate. If it has a Latin equivalent, we switch to that. If you notice you never see ironate we only see ferrate.


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