Use the dipole moments of HF and HCl (given at the end of...

Use the dipole moments of HF and HCl (given at the end of the problem) together with the percent ionic character of each bond (Figure 9.10 ) to estimate the bond length in each molecule. How well does your estimated bond length agree with the bond length in Table 9.4? $$\begin{aligned} \mathrm{HCl} \mu &=1.08 \mathrm{D} \\ \mathrm{HF} \mu &=1.82 \mathrm{D} \end{aligned}$$

Use the dipole moments of HF and HCl (given at the end of the problem) together with the percent ionic character of each bond (Figure 9.10 ) to estimate the bond length in each molecule. How well does your estimated bond length agree with the bond length in Table 9.4?
$$\begin{aligned} \mathrm{HCl} \mu &=1.08 \mathrm{D} \\ \mathrm{HF} \mu &=1.82 \mathrm{D} \end{aligned}$$

Labs

Want to see this concept in action?

NEW

Explore this concept interactively to see how it behaves as you change inputs.

View Labs

Key Concepts

Dipole Moment

A dipole moment is a vector quantity that measures the separation of positive and negative charges in a molecule. It is calculated as the product of the effective charge and the distance between the charges. This concept is essential for understanding molecular polarity and in relating the observed dipole moment to structural features such as bond length.

Ionic Character

Ionic character describes the extent to which a chemical bond between two atoms is ionic as opposed to covalent. It is typically expressed as a percentage and indicates how much electron density is transferred from one atom to another. This concept allows us to determine the effective charge used in dipole moment calculations for estimating bond lengths.

Bond Length Estimation from Dipole Moment

This concept involves using the relationship ? = ?·e·r, where ? is the dipole moment, ? is the fractional ionic character (representing the effective charge separation as a fraction of the elementary charge), e is the elementary charge, and r is the bond length. By rearranging this equation, one can estimate the bond length of a molecule from its measured dipole moment and known ionic character.

Transcript

Please give Ace some feedback