Question

when iodine is dissolved in aqueous potassium iodide, the shape of the species formed is

Answer 1

When KI and I2 react, the form KI3 as:

KI +  I2 -->KI3 

The shape of KI3 is determined as the triiodide ion I3- and K+ exist linearly.

Here, shape of triiodide ion is:

Total valance electrons = 3 x 7 + 1 =22

Bond pair = 2

Electrons used in octet = 2x8 = 16

Lone pair = 22-16 /2 = 3

Hybridization = sp3d,

structure = Trigonal bipyramidal

Shape = linear (two bond pair only)

Answer 2

Explanation:

When KI and I2 react, the form KI3 as:

KI + I2 -->KI3

The shape of KI3 is determined as the triiodide ion I3- and K+ exist linearly.

Here, shape of triiodide ion is:

Total valance electrons = 3 x 7 + 1 =22

Bond pair = 2

Electrons used in octet = 2x8 = 16

Lone pair = 22-16 /2 = 3

Hybridization = sp3d,

structure = Trigonal bipyramidal

Shape = linear (two bond pair only)

Hence, the ionic compound will exist in the form of a linear complex.