What is the order of polarity and why?
sodium chloride
urea
benzoic acid
napthalene
2007-09-13 05:40:49 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Sodium chloride is an ionic salt and dissociates to Na+ and Cl-, Cl- is most polar. In general ions are charged and have greater polarity due to the "naked' charge.
Benzoic acid is next, the carboxylic acid group can have it's H dissociate, since it is a weak acid, giving a carboxylate anion which is also charged like above; it is then second most polar.
Urea has C-O and C-N covalent bonds. These bonds are somewhat polar with the most polar bond being C-O (oxygen is more elctronegative than N and C).
Napthalene is least polar because it contains C-C and C-H bonds only. H is very comparable in polarity to C. There needs to be a difference in polarity between bonds in order to have a polar bond (at least 0.5 on Paulings EN or electronegativiy scale).
2007-09-13 06:10:50 · answer #1 · answered by Peter B 3 · 0⤊ 0⤋
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RE:
polarity question?
What is the order of polarity and why?
sodium chloride
urea
benzoic acid
napthalene
2015-08-15 08:08:21 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Increasing polarity:
Naphthalene < Urea < Benzoic acid < Sodium chloride
Napthalene is a relatively nonpolar hydrocarbon
Urea has separation of charges in its molecule among slightly (+) H's and slightly (-) O.
Benzoic acid is a slightly ionized weak acid.
Sodium chloride is a completely ionized salt.
2007-09-13 05:59:17 · answer #3 · answered by steve_geo1 7 · 1⤊ 0⤋
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2016-04-07 04:06:34 · answer #4 · answered by Anonymous · 0⤊ 0⤋
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2007-09-13 05:44:53 · answer #5 · answered by â??Markâ?? 2 · 0⤊ 0⤋