OZ - Structure And Bonding Flashcards
Predict the bind angle in an F2O molecule
104
It has 2 bonded pair
And 2 lone pairs
Lone pairs repel more than bonded pairs
Describe and explain one anomalous property of water, which results from hydrogen bonding
Liquid H2O is denser than solid
Describe the structure and bonding shown by chlorine
Cl has simple covalent bonds
Cl has Van Der Waal’s forces
Describe the structure of graphite
Giant covalent, lattice with layers
Why does graphite have a high melting and boiling point?
Strong covalent bonds
Why is graphite soft?
Weak forces between the layers
Name the shape of the ammonia molecule and explain
Trigonal pyramid
3 bonded pairs
1 lone pair
Lone pairs repel more than bonded pairs
Bond angle of tetrahedral molecules
109.5
Explain the electrical conductivities of sodium oxide
Sodium oxide does not conduct as a solid as ions cannot move
Sodium oxide conducts as a liquid as ions can move
Explain why H2O has a relatively high boiling point
Has hydrogen bonding
Suggest why H2S has a much lowe boiling point than H2O
H2S has weaker intermolecular forces
Draw a labelled diagram to show the currently accepted model for metallic bonding
A student finds that solid magnesium chloride and pure water do not conduct electricity. The student dissolves the magnesium chloride in the water, and the resulting solution does conduct electricity. Explain these observations.
MgCl2 does not conduct when solid because ions are fixed in lattice
H2O does not conduct as there are no free charge carriers
MgCl2 conducts when aqueous as ions are free to move
Why does carbon not boil t unless there are very high temperatures
Whereas chlorine is a gas at room temp
To boil Cl2, VDW forces are broken
To boil C, covalent bonds are broken
Covalent bonds are stronger than VDWs
