LESSON 7 | Electrochemistry Flashcards
a NEGATIVELY CHARGED atom or group of atoms
ANION
Electrode at which oxidation takes place.
Anode
One or more voltaic cells joined together as a single unit.
Battery
An electrochemical cell or series of cells in which a spontaneous redox reaction generates an electric current.
Battery
Electrode at which reduction takes place.
Cathode
A positively charged atom or group of atoms.
Cation
The electromotive force of an electrochemical cell.
The amount of work the cell can do per coulomb of charge.
Cell Potential
The amount of work the cell can do per coulomb of charge.
Cell Potential
A voltaic cell composed of zinc and graphite electrodes immersed in an aqueous paste of NH4Cl and MnO2.
Dry cell
A flow of electrons through a conductor.
Electricity
The study of the connection between oxidation-reduction reactions and the flow of electrons.
Electrochemistry
A surface in cell or an electrically conducting site at which either oxidation or reduction reaction takes place.
Electrode
The process of forcing electrical energy through an electrolytic cell, thereby causing a chemical reaction.
Electrolysis
A solute whose aqueous solution or molten state conducts electricity.
Electrolyte
A voltaic cell that converts electrical energy into chemical energy by means of a nonspontaneous reaction.
Electrolytic cell
The difference in electric potential between the two electrodes in a galvanic cell.
Electromotive force (EMF)
A voltaic cell that can generate continuous flow of electricity from the reaction of hydrogen and oxygen to produce water.
Fuel cell
Any electrochemical cell in which a spontaneous chemical reaction generates an electric current.
Galvanic cell
A rechargeable voltaic battery composed of lead and lead dioxide electrodes in a sulphuric acid solution.
Lead-acid battery
The loss of electrons as indicated by an increase in oxidation state.
Oxidation
Also called a redox reaction.
Oxidation-Reduction reaction
Chemical reaction involving an exchange of electrons.
Oxidation-Reduction reaction
A substance that gains electrons, making it possible for another substance to lose electrons and be oxidized. It is the substance reduced.
Oxidizing agent
A tool for keeping track of the flow of electrons in redox reactions. (also called oxidation state)
Oxidation number
The charge on an atom in a compound if all atoms were present as monoatomic ions.
Oxidation number
A battery that is not rechargeable.
Primary battery
The gain of electrons as indicated by a decrease in the oxidation number or state.
Reduction
An element, compound, or ion that reduces another reactant. It is the substance oxidized.
Reducing agent
used to allow the flow of ions into the individual half-cell compartments in an electrochemical cell and maintain charge neutrality or to keep the charges balanced.
Salt bridge Device
Batteries that are rechargeable; the consumed active materials can be regenerated and the battery is reusable for a number of times.
Example: Car battery
Secondary batteries
A spontaneous oxidation-reduction reaction that can be used to produce electrical energy.
Voltaic cell
