Question

1. Identify polar covalent bonds or ionic bonds formed in the binary compounds below. (a) C and S (b) Al and Ci position of the tokaular weight 2x230 (c) C and o (d) Ca and o

Answer 1

electronegativity difference values will be helpful in determining the
bond formed is covalent or ionic. These numbers will obtain from Pauling
electronegativity scale .when their difference dE.N is between 0.5 to 1.7
are polar covalent
dE.N value more than 1.5 is considered ionic bond
a)
C-S
dE.N = 2.58- 2.55 = 0.03
SO the bond is non polar covalent

b)
Al-Cl
dE.N = 3.16- 1.61 = 1.55 ,This value is in between 0.5 to 1.7
Hence it is polar covalent bond
c)
C-O
dE.N = 3.44- 2.55 = 0.89, this value lies between 0.5 and 1.7
So C-O bond is polar covalent

d)
Ca-O
dE.N = 3.44 - 1 = 2.44
The bond is ionic