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Shapes of Molecules and Hybridisation
Shapes of Molecules and Hybridisation
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Lewis Structures and Ionic Bonds
Shapes of Molecules and Hybridisation
Molecular Orbitals and Hydrogen Bonds
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17 problems
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Any
Conceptual
Numerical
1.
A bent molecule XY₂ has a total dipole moment of 1.20 D.
New
High School (11–12) · Shapes of Molecules and Hybridisation, Lewis Structures and Ionic Bonds
StemPy Lab
Hard
2.
Sulfur dioxide has a dipole moment of 1.63 D and a bond angle of 119°.
New
High School (11–12) · Shapes of Molecules and Hybridisation, Lewis Structures and Ionic Bonds
StemPy Lab
Medium
3.
Lithium fluoride and sodium bromide can be studied as single molecules in a hot gas.
New
High School (11–12) · Shapes of Molecules and Hybridisation, Lewis Structures and Ionic Bonds
StemPy Lab
Medium
4.
Dichlorobenzene has three isomers. The two C-Cl bonds lie in the plane of the ring, at 60° in the…
New
High School (11–12) · Shapes of Molecules and Hybridisation, Lewis Structures and Ionic Bonds
StemPy Lab
Medium
5.
Phosphorus is 3s² 3p³. Explain how it forms five bonds in PCl₅ and name the hybridisation.
New
High School (11–12) · Shapes of Molecules and Hybridisation
StemPy Lab
Hard
6.
Ethene, CH₂=CH₂, is flat. What is the hybridisation of each carbon atom?
New
High School (11–12) · Shapes of Molecules and Hybridisation
StemPy Lab
Medium
7.
In ethane, ethene and ethyne, the carbon atoms are sp³, sp² and sp.
New
High School (11–12) · Shapes of Molecules and Hybridisation
StemPy Lab
Medium
8.
Hydrogen chloride, chlorine and nitrogen are all covalent.
New
High School (11–12) · Shapes of Molecules and Hybridisation
StemPy Lab
Medium
9.
Count the sigma and pi bonds in propene, CH₂=CH-CH₃, and in propyne, HC≡C-CH₃.
New
High School (11–12) · Shapes of Molecules and Hybridisation
StemPy Lab
Medium
10.
The bond enthalpy of hydrogen is 435.8 kJ mol⁻¹.
New
High School (11–12) · Shapes of Molecules and Hybridisation
StemPy Lab
Easy
11.
Chlorine has 7 outer electrons. Find the electron pairs and lone pairs on chlorine in ClF₃.
New
High School (11–12) · Shapes of Molecules and Hybridisation
StemPy Lab
Hard
12.
Predict the shapes of the ammonium ion NH₄⁺, the hydronium ion H₃O⁺ and the amide ion NH₂⁻.
New
High School (11–12) · Shapes of Molecules and Hybridisation
StemPy Lab
Medium
13.
Xenon is a noble gas with 8 outer electrons, yet it forms XeF₂, XeF₄ and XeF₆.
New
High School (11–12) · Shapes of Molecules and Hybridisation
StemPy Lab
Medium
14.
Silicon (4 outer electrons), phosphorus (5) and sulphur (6) each form a chloride: SiCl₄, PCl₃ and…
New
High School (11–12) · Shapes of Molecules and Hybridisation
StemPy Lab
Easy
15.
Chlorine monofluoride, ClF, has a dipole moment of 0.88 D and a bond length of 163 pm.
New
High School (11–12) · Lewis Structures and Ionic Bonds, Shapes of Molecules and Hybridisation
StemPy Lab
Medium
16.
The carbonate ion, CO₃²⁻, has three canonical forms.
New
High School (11–12) · Lewis Structures and Ionic Bonds, Shapes of Molecules and Hybridisation
StemPy Lab
Medium
17.
Carbon to carbon bonds have these lengths and bond enthalpies: single, 154 pm and 348 kJ/mol…
New
High School (11–12) · Lewis Structures and Ionic Bonds, Shapes of Molecules and Hybridisation
StemPy Lab
Medium