AQA A LEVEL Chemistry FINAL EXAM
with questions and answers 2022/2023
Relative atomic mass - ANSWER;The average mass of an atom of an element, relative
to 1/12th of the mass of an atom of Carbon-12
Relative molecular mass - ANSWER;Average mass of a molecule compared to 1/12th
of the mass of a carbon-12 atom
The Avogradro constant - ANSWER;the number of particles in a mole
ideal gas equation - ANSWER;pV = nRT
empirical formula - ANSWER;the simplest whole number ratio of atoms of each element
in a compound
percentage atom economy - ANSWER;(Mass of desired product/total mass of
reactants) x 100
ionic bonding - ANSWER;the electrostatic attraction between oppositely charged ions in
a lattice
covalent bond - ANSWER;a shared pair of electrons between non-metal elements
co-ordinate bond - ANSWER;a shared pair of electrons where both electrons are
supplied by one atom
repulsion in shapes of molecules - ANSWER;Lone pair-lone pair > lone pair-bonding
pair > bonding pair-bonding pair
electronegativity - ANSWER;the power of an atom to attract the pair of electrons in a
covalent bond
hess' law - ANSWER;Total enthalpy change for a reaction is independent of the route
chosen
mean bond enthalpy - ANSWER;The energy required to break a covalent bond into
gaseous atoms averaged over different molecules
Bonds broken - bonds made
activation energy - ANSWER;The minimum amount of energy needed to start a
chemical reaction
, catalyst - ANSWER;A substance that increases the rate of a chemical reaction without
being changed by providing an alternative reaction pathway by lowering activation
energy
Le Chatelier's principle - ANSWER;When a system in dynamic equilibrium is subjected
to change, the position of equilibrium will shift to oppose the change.
oxidising agents - ANSWER;electron acceptors
reducing agents - ANSWER;electron donors
Enthalpy of formation - ANSWER;Enthalpy change when one mole of a compound is
formed from its constituent elements under standard conditions in their standard states
Enthalpy of atomization - ANSWER;The energy required to produce one mole of
gaseous atoms from an element in its standard state
Electron affinity - ANSWER;the enthaply change when one mole of gaseous atoms
forms one mole of -1 ions
Lattice enthalpy of formation - ANSWER;Enthalpy change when one mole of a solid
ionic compound is formed from its constituent ions in the gas phase
Lattice enthalpy of dissociation - ANSWER;Energy change when 1 mol of an ionic
lattice dissociates to its gaseous ions.
standard electrode potential - ANSWER;298K
100kPa
1.00moldm-3
Electrode reactions in lithium cell
(positive electrode) - ANSWER;Li+ + CoO2 + e- → Li+[CoO2]-
Electrode reactions in lithium cell
(negative electrode) - ANSWER;Li → Li+ + e-
Electrode reactions in hydrogen-oxygen fuel cell in acidic conditions
(positive electrode) - ANSWER;02 + 4H+ +4e- -> 2H20
Electrode reactions in hydrogen-oxygen fuel cell in acidic conditions
(negative electrode) - ANSWER;H2 -> 2H+ + 2e-
Brosted- lowry Acid - ANSWER;proton donor
Brosted- lowry base - ANSWER;proton acceptor
with questions and answers 2022/2023
Relative atomic mass - ANSWER;The average mass of an atom of an element, relative
to 1/12th of the mass of an atom of Carbon-12
Relative molecular mass - ANSWER;Average mass of a molecule compared to 1/12th
of the mass of a carbon-12 atom
The Avogradro constant - ANSWER;the number of particles in a mole
ideal gas equation - ANSWER;pV = nRT
empirical formula - ANSWER;the simplest whole number ratio of atoms of each element
in a compound
percentage atom economy - ANSWER;(Mass of desired product/total mass of
reactants) x 100
ionic bonding - ANSWER;the electrostatic attraction between oppositely charged ions in
a lattice
covalent bond - ANSWER;a shared pair of electrons between non-metal elements
co-ordinate bond - ANSWER;a shared pair of electrons where both electrons are
supplied by one atom
repulsion in shapes of molecules - ANSWER;Lone pair-lone pair > lone pair-bonding
pair > bonding pair-bonding pair
electronegativity - ANSWER;the power of an atom to attract the pair of electrons in a
covalent bond
hess' law - ANSWER;Total enthalpy change for a reaction is independent of the route
chosen
mean bond enthalpy - ANSWER;The energy required to break a covalent bond into
gaseous atoms averaged over different molecules
Bonds broken - bonds made
activation energy - ANSWER;The minimum amount of energy needed to start a
chemical reaction
, catalyst - ANSWER;A substance that increases the rate of a chemical reaction without
being changed by providing an alternative reaction pathway by lowering activation
energy
Le Chatelier's principle - ANSWER;When a system in dynamic equilibrium is subjected
to change, the position of equilibrium will shift to oppose the change.
oxidising agents - ANSWER;electron acceptors
reducing agents - ANSWER;electron donors
Enthalpy of formation - ANSWER;Enthalpy change when one mole of a compound is
formed from its constituent elements under standard conditions in their standard states
Enthalpy of atomization - ANSWER;The energy required to produce one mole of
gaseous atoms from an element in its standard state
Electron affinity - ANSWER;the enthaply change when one mole of gaseous atoms
forms one mole of -1 ions
Lattice enthalpy of formation - ANSWER;Enthalpy change when one mole of a solid
ionic compound is formed from its constituent ions in the gas phase
Lattice enthalpy of dissociation - ANSWER;Energy change when 1 mol of an ionic
lattice dissociates to its gaseous ions.
standard electrode potential - ANSWER;298K
100kPa
1.00moldm-3
Electrode reactions in lithium cell
(positive electrode) - ANSWER;Li+ + CoO2 + e- → Li+[CoO2]-
Electrode reactions in lithium cell
(negative electrode) - ANSWER;Li → Li+ + e-
Electrode reactions in hydrogen-oxygen fuel cell in acidic conditions
(positive electrode) - ANSWER;02 + 4H+ +4e- -> 2H20
Electrode reactions in hydrogen-oxygen fuel cell in acidic conditions
(negative electrode) - ANSWER;H2 -> 2H+ + 2e-
Brosted- lowry Acid - ANSWER;proton donor
Brosted- lowry base - ANSWER;proton acceptor
