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Ask iit jee aieee pet cbse icse state board community Community Discussion Question: The radius of cation is 95 pm and anion is 181 pm. What is the coordination no. of the
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[Post New]22 Jun 2008 13:24:05 IST
    Subject: The radius of cation is 95 pm and anion is 181 pm. What is the coordination no. of the
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juana (44)

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cation...


i cant understand what connection is there b/n the coordination no. and radii.


pls explain
    
[Post New]22 Jun 2008 14:18:47 IST
    Subject: Re:The radius of cation is 95 pm and anion is 181 pm. What is the coordination no. of the
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kria (478)

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wll radius ratio =r+/r-


so here we get 95/181=0.524


it lies b/w .414-0.732


so co-ordination no. is 6......


rate if its correct
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[Post New]22 Jun 2008 15:01:25 IST
    Subject: The radius of cation is 95 pm and anion is 181 pm. What is the coordination no. of the
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juana (44)

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yes kria ur right thanks
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[Post New]23 Jun 2008 21:00:38 IST
    Subject: Re:The radius of cation is 95 pm and anion is 181 pm. What is the coordination no. of the
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Anshul007 (123)

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These ques can be solved by pauling first rule
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[Post New]23 Jun 2008 21:03:11 IST
    Subject: The radius of cation is 95 pm and anion is 181 pm. What is the coordination no. of the
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Anshul007 (123)

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radius ratios and related polyhedraRadius ratio C.N. polyhedron
.225 4 tetrahedron
.414 6 octahedron
.592 7 capped octahedron
.645 8 square antiprism (anti cube)
.732 8 cube
.732 9 tri-capped trigonal prism
1.00 12 cube octahedron

0.524 lies in b/w 0.414 and 0.592
therefore co. no. should be 6
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[Post New]23 Jun 2008 21:25:03 IST
    Subject: The radius of cation is 95 pm and anion is 181 pm. What is the coordination no. of the
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rtiit (431)

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gud1 anshul!!!!!
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