Download - PROPERTIES OF IONIC COMPOUNDS
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PROPERTIES OF IONIC COMPOUNDS
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IONIC COMPOUND
ONE WITH IONIC BONDSEx: NaCl
CuSO4
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OBJECTIVE
After completing this presentation you should be able to:List and explain 4 properties of ionic compounds
List several people who care about each property and explain why they care
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1) FORM CRYSTALS
CRYSTAL: A REGULAR GEOMETRIC PATTERN
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WHO CARES?
A) GEOLOGISTSB) GEMOLOGISTS* COMPUTER CHIP DESIGNERS
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WHY FORM CRYSTALS?
IONS WANT CLOSEST PACKING POSSIBLE
A PATTERN FORMS (THE PATTERN DEPENDS ON THE SIZE OF THE IONS)
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2) HIGH MELTING POINT
TEMPERATURE REQUIRED TO CHANGE THE SOLID TO LIQUID
AVERAGES 1000 C
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WHO CARES?
MATERIALS SCIENTISTSSPECIALTY CERAMICSPEOPLE WHO NEED HIGH MELTING POINT MATERIALS!!!
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WHY HIGH MELTING POINT?
THE ELECTROSTATIC FORCE IS VERY STRONG
IT TAKES A LOT OF ENERGY TO BREAK THE FORCE TO ALLOW THE CRYSTAL TO MELT
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3) DISSOLVE IN WATER
THEY’RE WATER SOLUBLE
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WHO CARES?
FARMERSMEDICAL PROFESSIONALSATHLETES
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WHY WATER SOLUBLE?
WATER IS POLARTHE IONS IN THE CRYSTAL ARE AS ATTRACTED TO THE WATER’S CHARGES AS TO OTHER IONS
THERE IS MORE WATER AND THE WATER MOVES MORE
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4) THEY ARE ELECTROLYTES
ELECTROLYTE: CONDUCT ELECTRICITY WHEN DISSOLVED (OR MOLTEN)
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WHO CARES?
MEDICAL PROFESSIONALSANYONE WHO WANTS TO BE HEALTHY
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ELECTROLYTES
Na+: important to many systemsK+: respiratory systemCa+2 & Mg+2: large muscle groupsOthers include: Zn+2, Li+, I-
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WHY ARE THEY ELECTROLYTES?
IONS WILL CONDUCT ELECTRICITY WHEN THEY CAN MOVE
WHEN DISSOLVED THEY ARE FREE TO MOVE AND CARRY THE ELECTRICAL CURRENT
WHEN SOLID THEY CAN’T MOVE THEREFORE THEY DON’T CONDUCT
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