F325 Equilibria, Energetics & Elements definitions

All of the definitions you are required to know for the F325 paper according to the OCR specification.

?
  • Created by: Becky0295
  • Created on: 21-03-13 20:24
Rate of reaction
The change in concentration of a reactant or product per unit time.
1 of 21
Order
The power to which the concentration of the reactant is raised in the rate equation.
2 of 21
Rate constant (k)
The constant that links the rate of reaction with the concentrations of the reactants raised to the powers of their orders in the rate equation.
3 of 21
Half-life
The time taken for the concentration of a reactant to reduce by half.
4 of 21
Rate-determining step
The slowest step in the reaction mechanism of a multi-step reaction.
5 of 21
Conjugate acid-base pairs
A pair of two species that transform into each other by gain or loss of a proton.
6 of 21
Buffer solution
A system that minimises pH changes on addition of small amounts of an acid or a base.
7 of 21
Enthalpy change of neutralisation
The energy change that accompanies the neutralisation of an aqueous base to form one mole of H20 (l) under standard conditions.
8 of 21
Lattice enthalpy
The enthalpy change that accompanise the formation of one mole of an ionic compound from its gaseous ions under standard conditions.
9 of 21
Enthalpy change of solution
The enthalpy change that takes place when one mole of a compound is completely dissolved in water under standard conditions.
10 of 21
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.
11 of 21
Entropy
The quantitative measure of the degree of disorder in a system. A system becomes more energetically stable when it becomes more disordered.
12 of 21
Redox
A reaction in which both reduction and oxidation take place.
13 of 21
Oxidation number
A measure of the number of electrons that an atom uses to bond with atoms of another element.
14 of 21
Oxidising agent
A reagent that oxidises (takes electrons from) another species.
15 of 21
Reducing agent
A reagent that reduces (adds electrons to) another species
16 of 21
Standard electrode (redox) potential
The e.m.f of a half cell compared with a standard hydrogen half cell under standard conditions.
17 of 21
Transition element
A d-block element which forms an ion with an incomplete d sub-shell.
18 of 21
Ligand
A molecule or ion that can donate a pair of electrons with the transition metal ion to form a coordinate bond.
19 of 21
Coordinate bond
A shared pair of electrons in which the bonded pair has been provided by one of the bonding atoms only.
20 of 21
Coordination number
The total number of coordinate bonds formed between the central metal ion and any ligands.
21 of 21

Other cards in this set

Card 2

Front

The power to which the concentration of the reactant is raised in the rate equation.

Back

Order

Card 3

Front

The constant that links the rate of reaction with the concentrations of the reactants raised to the powers of their orders in the rate equation.

Back

Preview of the back of card 3

Card 4

Front

The time taken for the concentration of a reactant to reduce by half.

Back

Preview of the back of card 4

Card 5

Front

The slowest step in the reaction mechanism of a multi-step reaction.

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 Energetics resources »