F325 Key Definitions

This is a set of key definition flashcards for the OCR A chemistry unit F325: Equilibria, Energetics & Elements 

RATES AND ENTROPY DEFINITIONS TO BE ADDED SOON  

HideShow resource information
Redox
A reaction where both oxidation and reduction take place
1 of 33
Oxidation Number
A measure of the number of electrons that an atom uses to bona with atoms of a different element
2 of 33
Oxidising Agent
A reagent that oxidises (takes electrons from) another species
3 of 33
Reducing Agent
A reagent that oxidises (takes electrons from) another species
4 of 33
Standard Electrode Potential
Is the e.m.f of a half cell compared to the standard hydrogen half cell, measured at 298K with all solutions' concentrations at 1mol/dm^3 and a gas pressure of 100kPa (1 atm).
5 of 33
Fuel Cell
Uses the energy from the reaction of a fuel with oxygen to create a voltage
6 of 33
d-block Elements
The highest energy sub-shell is a d sub-shell
7 of 33
Ligand
A molecule or ion that can donate a pair of electrons to a transition metal ion to form a coordinate bond
8 of 33
Complex Ion
A transition metal ion bonded to one or more ligands by coordinate bonds (dative covalent bonds).
9 of 33
Coordinate Bond
A shared pair of electrons in which one of the bonded atoms provides both electrons for the shared pair
10 of 33
Coordination Number
The total number of coordinate bonds formed between a central metal ion and is ligands
11 of 33
Bidentate Ligand
A ligand which can donate two lone pairs of electrons to a metal ion to form two coordinate bonds
12 of 33
Ligand Substitution
A reaction in which one ligand in a complex ion is replaced by another ligand
13 of 33
Stereoisomers
Species with the same structural formula but a different arrangement of atoms in space
14 of 33
Optical Isomers
Stereoisomers that are a pair of non-superimposable mirror images of each other
15 of 33
Stability Constant, Kstab
The equilibrium constant for an equilibrium existing between a transition metal ion surrounded y water ligands and the complex formed when the same ion has undergone ligand substitution
16 of 33
le Chatlier's Principle
When a system in dynamic equilibrium is subjected to a change, the equilibrium position will shift to minimise the change
17 of 33
Acid
Proton Donor
18 of 33
Base
Proton Acceptor
19 of 33
Conjugate Acid-Base Pairs
A pair of two species that transform into each other by gain or loss of a proton
20 of 33
Strong Acid
A proton donor that completely dissociates in solution
21 of 33
Weak Acid
A proton donor that partially dissociates in solution
22 of 33
Buffer Solution
A system that minimise pH changes on addition of small amounts of an acid or a base
23 of 33
Enthalpy Change of Neutralisation
The energy change that accompanies the neutralisation of an aqueous acid by an aqueous base to form one mole of H20 (l) under standard conditions
24 of 33
Lattice Enthalpy
The enthalpy change that accompanies the formation of one mole of an ionic compound from its gaseous ions under standard conditions
25 of 33
Enthalpy Change of Solution
The enthalpy change that takes place when one mole of a compound is completely dissolved in water under standard conditions
26 of 33
Enthalpy Change of Hydration
The enthalpy change that takes place when one mole of isolated gaseous ions is dissolved in water forming one mole of aqueous ions under standard conditions
27 of 33
Enthalpy Change of Formation
The enthalpy change that takes place when one mole of a compound is formed from its constituent elements in their standard states under standard conditions
28 of 33
First Ionisation Energy
The enthalpy change accompanying the removal of one electron from each atom in one mole of gaseous atoms to form one mole of gaseous 1+ ions
29 of 33
Second Ionisation Energy
The enthalpy change accompanying the removal one one electron from each ion in one mole of gaseous 1+ ions to form one mole of gaseous 2+ ions
30 of 33
Enthalpy Change of Atomisation
The enthalpy change that takes place when one mole of gaseous atoms forms from the element in its standard state
31 of 33
First Electron Affinity
The enthalpy change accompanying the addition of one electron to each atom in one mole of gaseous atoms to from one mole of gaseous 1- ions
32 of 33
Second Electron Affinity
The enthalpy change accompanying the addition of one electron to each ion in one mole of gaseous 1- ions to form one mole of gaseous 2- ions
33 of 33

Other cards in this set

Card 2

Front

A measure of the number of electrons that an atom uses to bona with atoms of a different element

Back

Oxidation Number

Card 3

Front

A reagent that oxidises (takes electrons from) another species

Back

Preview of the back of card 3

Card 4

Front

A reagent that oxidises (takes electrons from) another species

Back

Preview of the back of card 4

Card 5

Front

Is the e.m.f of a half cell compared to the standard hydrogen half cell, measured at 298K with all solutions' concentrations at 1mol/dm^3 and a gas pressure of 100kPa (1 atm).

Back

Preview of the back of card 5
View more cards

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all Equilibria, Energetics & Elements resources »