13. Liquids, Solids & Intermolecular Forces
Molecular Polarity
13. Liquids, Solids & Intermolecular Forces
Molecular Polarity - Video Tutorials & Practice Problems
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Polarity of chemical bonds happen in molecules when there is an unequal sharing of electrons.
Molecular Polarity
1
concept
Molecular Polarity Concept 1
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Both a molecule's shape and bond polarity can affect its overall polarity.
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concept
Molecular Polarity Concept 2
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Perfect Shape I: When the central element has no lone pairs and has the same surrounding elements then usually the molecule is nonpolar.
Perfect Shape II: When the central element has same surrounding elements and has a linear or square planar geometry.
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example
Molecular Polarity Example 1
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4
Problem
ProblemDetermine if the compound of BCl2F is polar or nonpolar.
A
polar
B
nonpolar
C
cannot be determined
5
Problem
ProblemDetermine if phosphorus trihydride, PH3, is polar or nonpolar.
A
Polar
B
Nonpolar
C
Cannot be determined
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Problem
ProblemWhich of the following compounds is/are nonpolar?
I. COF2 II. ICl2– III. XeF4 IV. C8H18
A
I only
B
II, IV
C
I, III
D
II, III, IV
E
All of the above
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Problem
ProblemDetermine if disulfur dichloride, S2Cl2, is polar or nonpolar.
A
Polar
B
Nonpolar
C
Cannot be determined
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PRACTICE PROBLEMS AND ACTIVITIES (53)
- The molecule shown here is difluoromethane 1CH2F22, which is used as a refrigerant called R-32. (c) If the m...
- The molecules have the same molecular formula (C3H8O) but different chemical structures. (b) Which molecule d...
- Which molecule has polar bonds but is nonpolar? (LO 8.6) (a) SF6 (b) SF2 (c) F2 (d) NF3
- Ethyl acetate, CH3CO2CH2CH3, is commonly used as a solvent and nail-polish remover. Look at the following ele...
- The dipole moment of methanol is m = 1.70 D. Use arrows to indicate the direction in which electrons are displ...
- (a) Does CS2 have a dipole moment? If so, in which direction does the net dipole point?
- (a) Consider the following two molecules: PCl3 and BCl3. Which molecule has a nonzero dipole moment?
- Predict whether each of the following molecules is polar or nonpolar: (a) IF, (b) CS2, (c) SO3, (d) PCl3, (e) ...
- Predict whether each of the following molecules is polar or nonpolar: (a) CCl4, (b) NH3, (c) SF4, (d) XeF4, (e...
- Dichloroethylene 1C2H2Cl22 has three forms (isomers), each of which is a different substance. (b) Which of th...
- Dihydroxybenzene, C6H6O2, exists in three forms (isomers) called ortho, meta, and para: Which of these has...
- Explain why CO2 and CCl4 are both nonpolar even though they contain polar bonds.
- CH3F is a polar molecule, even though the tetrahedral geometry often leads to nonpolar molecules. Explain.
- Determine whether each molecule in Exercise 57 is polar or nonpolar. a. PF3 b. SBr2 c. CHCl3 d. CS2
- Determine whether each molecule in Exercise 58 is polar or nonpolar. a. CF4 b. NF3 c. OF2 d. H2S
- Determine whether each molecule is polar or nonpolar. c. BrCl5
- Determine whether each molecule is polar or nonpolar. b. SCl4
- Determine whether each molecule is polar or nonpolar. a. SiCl4 b. CF2Cl2 c. SeF6 d. IF5
- Which of the following substances would you expect to have a nonzero dipole moment? Explain, and show the dir...
- Draw three-dimensional structures of PCl3 and PCl5, and then explain why one of the molecules has a dipole mo...
- Of the two compounds SiF4 and SF4, which is polar and which is nonpolar?
- Fluorine is more electronegative than chlorine, yet fluoromethane 1CH3F; m = 1.86 D2 has a smaller dipole mome...
- Most vitamins can be classified as either fat soluble, which results in their tendency to accumulate in the b...
- Most vitamins can be classified as either fat soluble, which results in their tendency to accumulate in the bo...
- Fill in the blank spaces in the following chart. If the molecule column is blank, find an example that fulfill...
- Draw the structure of a molecule with the formula C4H6Cl2 that has a dipole moment of 0.
- Just as individual bonds in a molecule are often polar, molecules as a whole are also often polar because of t...
- For each molecule, specify the polarity of the bonds and the overall polarity of the molecule.
- why does the presence of lone pair electrons contribute to the polarity of a water molecule?
- N2O polar or nonpolar
- Determine the electron geometry (eg), molecular geometry (mg), and polarity of SO3.
- Which formula represents a nonpolar molecule containing polar covalent bonds
- Predict whether each of the following molecules is polar or nonpolar.
- Which one of the following exhibits dipole-dipole attraction between molecules?
- Where, approximately, is the negative pole on each of these molecules?
- Water is known as a polar molecule because
- How many of the following molecules are polar
- Which of these af3 molecules will have a nonzero dipole moment?
- Is N2O polar or nonpolar?
- What kind of charge would the oxygen atom have compared to the hydrogen atoms?
- The molecular geometry of the PF3 molecule is ________, and this molecule is ________.
- Given six molecules, identify the molecules with polar bonds and the molecules that are polar.
- Which of the following compounds are polar: CBr4, XeF2, SCl4, BrF3, CH3OH
- In a water molecule, which atom has the strongest attraction for shared electrons?
- Classify these molecules as polar or nonpolar. Drag each item to the appropriate bin.
- Which of the molecules below will be polar? CS2, BF3, SO2, CH3Br
- Which species has a net dipole moment (i.e., are polar overall)? Select all that apply.
- Classify these molecules as polar or nonpolar. Drag each item to the appropriate bin.
- Look up the structure for chlorophyll b. do you expect it to be more or less polar.
- Choose the compound below that contains at least one polar covalent bond, but is nonpolar.
- Water is an unique substance. Which of the following is false regarding water ?
- Consider BF3, SO3, and XeO3. Which of these molecules is considered to be polar?
- Because water has one side positively charged and one side negatively charged it is considered