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Unit 8 Redox
redox chem
18
Chemistry
10th Grade
05/08/2017

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Cards

Term
What particles are transferred in redox?
Definition
electrons
Term
What is oxidation?
Definition
when a substance loses electrons
Term
What is reduction?
Definition
when a substance gains electrons
Term
Where does oxidation occur?
Definition
anode
Term
Where does reduction occur?
Definition
cathode
Term
What is the oxidation number?
Definition
a possible charge the atom could have
Term
In terms of energy transfer, what does a voltaic cell do?
Definition
convert chemical energy to electrical energy
Term
In terms of ions, what does a salt bridge do?
Definition
allows ions to flow to the anode and cathode so charge does not build up
Term
In an oxidation half-reaction, where are the electrons?
Definition
product side
Term
In an reduction half-reaction, where are the electrons?
Definition
reactant side
Term
What does LEO GER help us remember?
Definition
lose electrons oxidation
gain electrons reduction
Term
What does AN OX and RED CAT help us remember?
Definition
anode oxidation
reduction cathode
Term
How do electrons flow in a cell?
Definition
from anode to cathode
Term
How is an electrolytic cell different from a voltaic cell?
Definition
Voltaic cells have salt bridges, and electrolytic cells require a power source like a battery.
Term
In terms of energy transfer, what does an electrolytic cell do?
Definition
convert electrical energy to chemical energy
Term
What are two examples of electrolytic cells?
Definition
plating expensive metals onto cheap metals
electrolysis of water
Term
How can you identify that a reaction is a redox reaction?
Definition
change in oxidation number
also, all single replacement and combustion are redox
Term
What must be equal in all redox reactions?
Definition
electrons lost must equal electrons gained
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