additional definitions Flashcards
anode
an electrode at which an oxidation reaction occurs
battery
a series of galvanic cells
bond
link between atoms to form molecules/lattices
cathode
an electrode at which a reduction reaction occurs
corrosion
redox reaction where metal is oxidised to form metal ions and oxygen is reduced to form oxide ions
dependant variable
- what is measured
dilution
when a solution of known concentration is diluted with distilled water to produce another solution of less concentration
discrete
numerical data that occurs in whole numbers (integers)
electrode
a solid, often a piece of metal that is the site of oxidation/reduction in a galvanic cell
galvanic cell
spontaneous redox reaction that takes place in cells/batteries
half cell
when a galvanic cell is separated into parts
eg copper electrode in a sol of copper(II) ions
half equation
eq used to represent either oxidation/reduction
immiscible
when 2 substances do not mix
independent variable
what is purposely changed
intermolecular v intramolecular
between molecules, within a molecule
net dipole
overall separation of partial pos/neg charges in a molecule (overall neutral)
OILRIG
‘Oxidation is Loss of elections and Reduction is Gain of electrons’
oxidation
process by which chemical species loses e-
oxidation half eq
represents oxidation of a reactant, e- are shown as products
oxidising agent
reactant that causes another reactant to lose e- during redox reaction
*oxidising agent is reduced in reaction, gains e-
% abundance
how common particular substance is out of 100
% composition
proportion by mass of the diff elements in a compound
redox reaction
e- transfer occurs from the reducing agent to oxidising agent
*both oxidation/reduction occur at same time
reducing agent
causes another reactant to gain e- during a redox reaction
- reducing agent is oxidised in reaction, loses e-
reduction
process by which a chem species gains e-
reduction half eq
shows reduction of a reactant, e- shown as reactants
