FREE IGNOU BCHCT 131 SOLVED ASSIGNMENT 2023
Question 9: Calculate the percentage ionic character in HBr gas.
Percentage ionic character = (Measured dipole moment / Dipole moment for complete ionic bond) * 100
Given: Dipole moment of HBr = 2.635 x 10⁻³⁰ C m
Bond length of HBr = 141 pm (1 pm = 10⁻¹² m)
Dipole moment for complete ionic bond (calculated theoretically) ≈ e * d (charge * distance)
Calculate the theoretical dipole moment and then use the formula to find the percentage ionic character.
