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NCEA Level 2 Chemistry 91166 and 91164

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jogle's version from 2017-08-21 09:17

Particle Types

Question Answer
Uncharged particles made up of more than one atom bonded together eg, the particles in water or carbon dioxidemolecules
Uncharged, separate particles eg, those in diamond or silicaatoms
charged particles eg, those in salt (sodium chloride)ions
Small charged particles that are attracted to the nuclei of surrounding atoms eg, those in metals like copper or magnesiumdelocalised electrons
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Properties of Substances

Question Answer
Does an ionic solid conduct?no
Does an ionic substance in a solution, or molten conduct?yes
What are the charge carriers in an ionic substance?ions
Ionic substances have a ____ melting pointhigh
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Question Answer
Does a molecular solid conduct?no
Does a molecular substance in a solution, or molten conduct?no
Molecular substances have a ____ melting pointlow
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Question Answer
Does a metallic solid conduct?yes
Does a metallic substance in a solution, or molten conduct?yes
What are the charge carriers in a metallic substance?mobile electrons
Metallic substances have a ____ melting pointfairly high
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Question Answer
Does a covalent network solid conduct?no, except for graphite
Does a covalent network substance in a solution, or molten conduct?if able to be melted, liquid does not conduct
Covalent network substances have a ____ melting pointvery high
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Question Answer
These solids conduct electricity when molten, but not when solidionic
These do not conduct electricitymolecular
These solids conduct electricity when solid and moltenmetallic
These do not conduct electricitycovalent network
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Question Answer
Those that conduct when molten but not when solid must contain ____ that are free to move when molten but not when solid.ions
Those that conduct in a solid state must containcharged particles that are free to move
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calculations with Kc and pH

 

Question Answer
pH =-log[H3O]+
[H3O]+ =10-pH
[OH]- = 10-14/ [H3O]+
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Question Answer
-log[H3O]+ =pH
10-pH =[H3O]+
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something else

Question Answer
Equilibrium moves in the direction that ____ _____reduces change
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