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What is ionic bonding?
The transfer of electrons.
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What do ionic compounds always have?
Giant ionic lattices.
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Name three properties of ionic compounds.
High melting/boiling point and carry electric current.
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What is covalent bonding?
Sharing of electrons.
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What are the two types of covalent structures?
Simple molecular substances and giant covalent structures.
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Give two examples of a giant covalent structure.
Diamonds and graphite.
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What are fullerenes?
Molecules of carbon shaped in a hollow ball or closed tubes, the carbon atoms are hexagonal rings.
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Where can fullerenes be used?
In nanoparticles/nanotubes.
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What kind of forces are in thermosoftening ploymers?
Weak intermolecular forces with no cross links.
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How is low density polythene made?
Heating ethene to about 200 degrees at high pressure.
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What is the relative formula mass (Mr)?
Atomic mass in a compound added up.
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What is a mole?
The relative formula mass of a substance in grams.
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How do you work out percentage of an element in a compound?
Relative atomic mass (of the element) divided by Realtive formula mass of the whole compound times 100.
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What is a reversible reaction?
A reaction where the products can themselves react to produce the reactants.
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What 4 thins effect the rate of a reaction?
Temperature, concentration, surface area (of solids) and catalyst.
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What is a base?
A substance with a ph above 7
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What is an alkali?
A base dissolved in water.
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What ions do acids form in water?
H+
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Acid + Metal ---> ?
Salt +hydrogen.
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What salts are produced by hydrochloric acid?
chloride salts.
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What salts are produced from sulfuric acid?
Sulfate salts.
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Acid + Metal Hydroxides/oxides --> ?
Salt + Water.
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What salt would you get from a reaction between hydrochloric acid and copper oxide?
Copper chloride (+Water).
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What does OILRIG stand for?
Oxidation is loss reduction is gain.
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What kind of substances are used in electrolysis?
Ionic substances that are molten or dissolved.
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What are the positive and negative electrodes called?
Positive is anode and negative is cathode.
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Why is electrolysis of table salt (sodium chloride) solution useful?
It produces hydrogen, chlorine and Sodium hydroxide.
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Name one use of hydrogen and one use of chlorine.
Hydrogen can be used in the haber process and chlorine can be used in water treatment.
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Why is aluminium oxide mixed with molten cryolite?
Lower the melting point from 2000 degrees to 900 degrees which is cheaper.
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What is the half equation of the negative electrode (electrolysis of aluminium)?
Al3+ + 3e- ---> Al
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What is electro plating and why might it be used?
Using electrolysis to coat the surface of a metal with another metal. Can be used for decoration or conduction.
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What is the liquid that conducts electricity in elctrolysis?
The electrolyte.
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Why must the electrolye contain free ions?
They conduct electricity which completes the circuit.
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Other cards in this set

Card 2

Front

What do ionic compounds always have?

Back

Giant ionic lattices.

Card 3

Front

Name three properties of ionic compounds.

Back

Preview of the front of card 3

Card 4

Front

What is covalent bonding?

Back

Preview of the front of card 4

Card 5

Front

What are the two types of covalent structures?

Back

Preview of the front of card 5
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