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48 Cards in this Set
- Front
- Back
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What is oxidation
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Loss of electrons
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What is reduction
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Gain of electrons
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What are acid base reactions
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transfer of protons
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What are oxidation reduction reaction
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Transfer of electrons
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What is complementary processes
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Occur at same time
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What is an example of oxidation reaction
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Na = s na + = 2 e-
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What is an example of reduction
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Cl2 – 2e-= 2cl-
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What I a half reaction
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Another names for oxidation reduction each oxidation or reduction represents one half
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What is a reducing agent
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Any reactant that cause another reactant to be reduced
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When does this happens
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In oxidation process
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What is a oxidizing agent
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Any reactant that cause another reactant to gain electrons
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When does this happen
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during reduction process
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What does the periodic table go from
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loss of electrons to gain of electrons
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What is electrochemistry
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Study of relation ship between electric energy and chemical change
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What does oxidation reduction produce
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Electric current
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What does the use of electric current produce
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Oxidation reduction
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What does reducing agent produce
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Electron current
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What does a oxidizing agent produce
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Electric current
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How can electric energy be created
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By oxidation reduction reaction
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What are voltaic cells
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Self contained unit
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What is an example of this
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Battery
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What kinds of batteries are there
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Disposable or rechargeable
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What is a battery
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Two materials to oxidize and reduce each other that are connected by a medium through which ions travel to balance external flow of elections
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What is a electrode
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Any material that conducts electrons into or out of a medium in which electrochemical reactions are occurring
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What is a cathode
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Electrode where chemicals are reduced
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What is the charge
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positive
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What where does this occur
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Reductions reactions
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What is an anode
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Electrode where chemical are oxidized
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What is the charge
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Negative
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where is this found
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Oxidation reactions
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What are the two types of disposable batteries
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Dry cell and alkaline
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What are dry cell batteries
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Two gases produced as the result of reduction of ammonium ions
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What are alkaline batteries
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More expensive steady voltage
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What are the characteristics of disposable batteries
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Short lives because electron producing chemicals are consumed in their use
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What are rechargeable batteries
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Regenerate the chemical that can release electrons on demand
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What are fuel cells
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devices that convert energy of a fuel to electrical energy
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What are the compartments of fuel cells
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Electro hydrogen fuel and oxygen fuel
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What are these separated by
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Porous electrons
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How long do fuel cells work
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As long as fuel is supplied
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What is the most common oxidizing agent
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Oxygen
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What happen during reaction
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Reduction gains electrons
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What are the two types of oxygen reduction reactions
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Combustions and corrosion
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What is corrosion
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process where by a metal deteriorates
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What happens when you add oxygen water and iron together
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Rust
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What also rusts
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aluminum and steel
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What is combustion
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Reduction reaction between a material and molecular oxygen
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What are the products of this
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Carbon dioxide and water
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What are the characteristics of combustion
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every releasing exothermic
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