Chapter 8, Problem 115A

Interpretation Introduction

Interpretation:

The location of bonding electrons in polar covalent bond and those in a non-polar covalent bond needs to be explained.

Concept introduction:

Covalent bonds are chemical bonds where two or more atoms share one or more electron pairs. Polar covalent bonds are formed when the bonded pair of electron is not equally shared. This is due to the difference in electro negativity between the two bonded atoms.

Answer to Problem 115A

In polar covalent bond, location of electrons is near more electronegative atom but electrons shared equally in non polar covalent bond.

Explanation of Solution

Polar molecules have uneven electron density and they have dipole with partially charged ends. Due to unequal sharing of electrons in polar molecule, electrons spent most of the time near more electronegative atom. But in case of non-polar molecule electrons are shared equally.

Conclusion

Polar molecules consist of permanent dipoles due to positive and negative charge ends.