Q22 E - Chemistry (OpenStax)

Question

Which of the following molecules or ions contain polar bonds? (a) \({{\rm{S}}_{\rm{8}}}\) (b) \({{\rm{S}}_{\rm{8}}}\) (c) \({{\rm{O}}_{\rm{2}}}^{{\rm{2 - }}}\) (d) \({\rm{N}}{{\rm{O}}_{\rm{3}}}^{\rm{ - }}\) (e) \({\rm{C}}{{\rm{O}}_{\rm{2}}}\) (f) \({{\rm{H}}_{\rm{2}}}{\rm{S}}\) (g) \({\rm{B}}{{\rm{H}}_{\rm{4}}}^{\rm{ - }}\) .

Step-by-Step Solution

Answer

The values which have non-polar bonds are: \({{\rm{O}}_{\rm{3}}}{\rm{ , }}{{\rm{S}}_{\rm{8}}}\) and \({{\rm{O}}_{\rm{2}}}^{{\rm{2 - }}}\).

The values which have polar bonds are: \({\rm{N}}{{\rm{O}}_{\rm{3}}}^{\rm{ - }}{\rm{ , C}}{{\rm{O}}_{\rm{2}}}{\rm{ , }}{{\rm{H}}_{\rm{2}}}{\rm{S}}\) and \({\rm{B}}{{\rm{H}}_{\rm{4}}}^{\rm{ - }}\) .

Define Chemical Bonding

A chemical bond is an attraction between atoms, ions, or molecules that allows chemical compounds to form.

Finding which molecules or ions contain polar bonds?

The concept applied in this topic is that compounds having a single kind of element will have non-polar bonds since the electronegativity difference will be zero.

As a result of the foregoing reasoning, \({{\rm{O}}_{\rm{3}}}{\rm{ , }}{{\rm{S}}_{\rm{8}}}\), and \({{\rm{O}}_{\rm{2}}}^{{\rm{2 - }}}\) have nonpolar bonds, whereas \({\rm{N}}{{\rm{O}}_{\rm{3}}}^{\rm{ - }}{\rm{ , C}}{{\rm{O}}_{\rm{2}}}{\rm{ , }}{{\rm{H}}_{\rm{2}}}{\rm{S}}\), and \({\rm{B}}{{\rm{H}}_{\rm{4}}}^{\rm{ - }}\) have polar bonds.

Therefore, the values having non-polar bonds are: \({{\rm{O}}_{\rm{3}}}{\rm{ , }}{{\rm{S}}_{\rm{8}}}\) and \({{\rm{O}}_{\rm{2}}}^{{\rm{2 - }}}\).

The values having polar bonds are: \({\rm{N}}{{\rm{O}}_{\rm{3}}}^{\rm{ - }}{\rm{ , C}}{{\rm{O}}_{\rm{2}}}{\rm{ , }}{{\rm{H}}_{\rm{2}}}{\rm{S}}\) and \({\rm{B}}{{\rm{H}}_{\rm{4}}}^{\rm{ - }}\) .