Skip to main content
Ch.8 - Basic Concepts of Chemical Bonding
Brown - Chemistry: The Central Science 14th Edition
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoBrown 14th EditionCh.8 - Basic Concepts of Chemical BondingProblema 44
Capitolo 8, Problema 44

The iodine monobromide molecule, IBr, has a bond length of 249 pm and a dipole moment of 1.21 D. (a) Which atom of the molecule is expected to have a negative charge?

Guida verificata passo dopo passo
1
Identify the atoms in the IBr molecule: iodine (I) and bromine (Br).
Recall that the dipole moment is a measure of the separation of positive and negative charges in a molecule.
Understand that the dipole moment points from the positive to the negative charge.
Consider the electronegativity of the atoms: Bromine (Br) is more electronegative than iodine (I).
Conclude that the more electronegative atom, bromine (Br), will have a partial negative charge, while iodine (I) will have a partial positive charge.

Risposta video verificata per un problema simile:

Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.
Durata del video:
55s

Concetti chiave

Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.

Electronegativity

Electronegativity is a measure of an atom's ability to attract and hold onto electrons in a chemical bond. In the case of IBr, iodine (I) is less electronegative than bromine (Br), meaning that Br will attract the shared electrons more strongly, leading to a partial negative charge on the bromine atom.
Video consigliato:
Percorso guidato
02:10
Electronegativity Trends

Dipole Moment

The dipole moment is a vector quantity that represents the separation of positive and negative charges in a molecule. It is calculated as the product of the charge and the distance between the charges. In IBr, the dipole moment of 1.21 D indicates that there is an uneven distribution of electron density, confirming that one atom carries a partial negative charge.
Video consigliato:
Percorso guidato
01:25
Dipole Moment

Bond Polarity

Bond polarity refers to the distribution of electrical charge over the atoms joined by the bond. In IBr, the difference in electronegativity between bromine and iodine results in a polar covalent bond, where bromine becomes partially negative and iodine partially positive, leading to the overall dipole moment observed in the molecule.
Video consigliato:
Percorso guidato
02:38
Molecular Polarity
Pratica correlata
Domanda del libro di testo

In the following pairs of binary compounds, determine which one is a molecular substance and which one is an ionic substance. Use the appropriate naming convention (for ionic or molecular substances) to assign a name to each compound: (a) TiCl4 and CaF2 (b) ClF3 and VF3

844
views
Domanda del libro di testo

Arrange the bonds in each of the following sets in order of increasing polarity: (c) C—S, B—F, N—O.

697
views
Domanda del libro di testo

(b) If you were to put HBr under very high pressure, so its bond length decreased significantly, would its dipole moment increase, decrease, or stay the same, if you assume that the effective charges on the atoms do not change?

821
views
Domanda del libro di testo

(a) From the data in Table 8.2, calculate the effective charges on the H atom of the HBr molecule in units of the electronic charge, e.

2145
views
1
comments
Domanda del libro di testo

In the following pairs of binary compounds, determine which one is a molecular substance and which one is an ionic substance. Use the appropriate naming convention (for ionic or molecular substances) to assign a name to each compound: (c) SbCl5 and AlF3.

1021
views
Domanda del libro di testo

In the following pairs of binary compounds, determine which one is a molecular substance and which one is an ionic substance. Use the appropriate naming convention (for ionic or molecular substances) to assign a name to each compound: (a) SiF4 and LaF3 (for ionic or molecular substances) to assign a name to each compound: (b) FeCl2 and ReCl6 (c) PbCl4 and RbCl.

550
views