electrochemistry.
Terms
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- Electrolytes
- substance that releases or produces ions when dissolved in water.
- electrochemical cell
-
devices that use redox reactions to either produce or use electricity
- electrodes
-
made of electrical conductors where electrons enter and exit electrochemical cells
- Voltaic cell
- electrochemical cells that produce electricity as the result of spontaneous redox reactions that realease energy
- Electrolytic cell
- electrochemical cells that can be used to drive redox reactions (non spontaneous)
- Half Cells
- One cell corresponds to the oxidation half reaction and one corresponds to the reduction half reaction
- anode
- electrode at which oxidation occurs
- cathode
- electrode at which reduction occurs
- Salt Bridge
- contains an electrolytic solution that connects 2 half cells
- were charge is +
- cathode
- Cell potential
- potential of the cells to move electrons
- cell voltage
- measurement of cell potential
- standard cell potential
- evergy released as reaction goes on to the work that is done.
- common dry cell
- voltaic cell in which the electrolyte is a paste.
- adv. low cost...dis adv: not rechargeable, not as strong (volts)
- common dry cell
- alkaline dry cell
- modification of the ordinary dry cell
-
adv. : longer shelf life, steady voltage, more energy.
dis adv. : more expensive because of structure - alkaline dry cell
- Lead Storage Battery
- electrodes are composed of alternating sheets of lead and lead dioxide
- electrolyte is sulfuric acid
- lead storage battery
- Nickel - Cadmium Battery
- widely used in cordless appliances...cell fone.
- Fuel Cell
- voltaic cell in which a fuel is continuously supplied from a existing resevar to cell.
- efficient at converting chemical energy into electric energy
- fuel cell
- electrolysis
- the process by which electricity is used to bring about a non spontaneous chemical change.
- electrolysis of Molten Sodium Chloride
- Produces metallic sodium and forms chlorine gas
- Electrolysis of Aqueous Sodium Chloride
- . na is a spectator ion.