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Rachel Yu 1G
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Joined: Fri Aug 09, 2019 12:15 am


Postby Rachel Yu 1G » Tue Nov 26, 2019 1:43 pm

9C.9. With the help of Table 9C.1 determine the coordination number of the metal ion in each of the following complexes.

a. [NiCl4]2-
b. [Ag(NH3)2]+
c. [PtCl(en)2]2+
d. [Cr(edta)]-

Can someone explain how to get the right coordination numbers for part c and d?

Posts: 54
Joined: Thu Jul 25, 2019 12:17 am

Re: 9C.9

Postby 905416023 » Tue Nov 26, 2019 2:42 pm

For part c the coordination number is 6 (en is bidentate) and d is also 6 (EDTA is hexadentate)

Audrie Chan-3B
Posts: 50
Joined: Thu Jul 25, 2019 12:17 am

Re: 9C.9

Postby Audrie Chan-3B » Tue Nov 26, 2019 4:25 pm

To get the correct answer you need to find the coordination number which is essentially the number of atoms bonding to the central metal ion. For c and d, look at the bonding sites for each compound. There are 2 bonding sites in en and 2 en, plus the 2 chlorine atoms, meaning there are 6 atoms attached to the central metal atom. For d, there are 6 bonding sites in edta, so 6 atoms attached to Cr.

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