In which of the following compounds does ionic bonding predominate?

Chemistry
Tutor: None Selected Time limit: 1 Day

In which of the following compounds does ionic bonding predominate?
(a)NH4Cl
(b)CO2
(c)CH4
(d)LiBr
Jan 9th, 2015

There are few to none 100% ionic bonds in compounds. When people are talking about ionic bonds they are really talking about bonds with high ionic character. Of the compounds in your list, only CaCl2 and K2O exhibit bonds with relatively high ionic character. Ionic character can be calculated from the electronegativity difference, ΔEN. 

%ionic char. = 100[1 - e^(-ΔEN²/4)] 

Bond .... % ionic character 

N-H .............. 16% 

Ca-Cl ........... 69% 

P-Cl ............. 21% 

K-O ............. 82%


Jan 9th, 2015

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