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Chem 152
Electrochemistry: redox reactions
8
Chemistry
Undergraduate 1
04/18/2011

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Term
Electrochemistry
Definition

Chemistry that involves the use of electricity

 

Term
What is electricity?
Definition
The flow of charged particles
Term
Current
Definition
The rate of the flow of electrons, or any charged particle
Term
What is needed to get electrons to flow?
Definition
Atoms willing to donate electrons AND something willing to accept electrons.
Term
Oxidation
Definition
An element loses electrons, oxidation number increases
Term
Reduction
Definition
An element that gains electrons, oxidation number decreases
Term
Oxidation Rules
Definition
  1. Any element in its natural state/elemental form is neutral. Oxidation state = 1
  2. Oxidation number of hydrogen is 1
  3. Oxidation number of an ion is the value of that ion
  4. Oxidation number of oxygen is -2
  5. Sum of oxidation numbers for any compound is 0
  6. Sum of oxidation numbers for any ion is the charge of the ion
Term
Half Reaction
Definition
Ever redox reaction has 2 halves, the oxidation portion and the reaction portion
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