10/13 notes Flashcards

1
Q

what factors influence lattice energy

A

1)change of the ions dominance effect
2)size of the ions (distance between ions)

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2
Q

what does higher charge mean about lattice energy

A

larger lattice energy (stronger ionic bonds)

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3
Q

how do smaller sized ions and shorter bond lengths influence lattice energy

A

larger lattice energy

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4
Q

what is the overall formula of ionic compound

A

overall neutral

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5
Q

what is occasionally trapped in the lattice

A

water

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6
Q

what are four properties of ionic compounds

A

1)solids at room temp and pressure
2)brittle
3)dissolve in water or polar solvent
4)does not conduct electricity as solid, just liquid

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7
Q

what do you need more of to conduct electricity

A

mobile charged particles

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8
Q

what does brittle mean

A

not malleable/ductile, cant bend it

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9
Q

are ionic bonds strong

A

yes

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10
Q

what happens to the lattice shape when it starts to dissolve in water

A

corner pieces are pulled off

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11
Q

definition of lattice energy

A

the energy required to convert one mole of an ionic solid into gaseous ionic constituents.

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12
Q

when will lattice energies take positive values

A

with endothermic reactions

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13
Q

when will lattice energies take negative values

A

with exothermic reactions

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14
Q

endothermic

A

absorb heat

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