F325 - Module 1

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Rate of reaction
The change in concentration of a reactant or product per unit time.
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Initial rate of reaction
The change in concentration of a reactant, or product, when t=0.
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Order
The power to which the concentration of the reactant is raised in the rate equation.
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Overall order
Sum of the individual orders.
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Half-life
The time taken for the concentration of the reactant to reduce by half.
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Rate-determining step
Slowest step in the reaction mechanism.
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Intermediate
A species formed in one step of a reaction that is used up in a subsequent step, and is not seen as either a reactant, or a product of the overall equation.
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Dynamic equilibrium
Exists in a closed system when the rate of the forward reaction is equal to the rate of the reverse reaction.
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Homogeneous equilibrium
An equilibrium in which all the species making up the reactants and products are in the same physical state.
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Heterogeneous equilibrium
An equilibrium in which all the species making up the reactants and products are in different physical states.
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Bronsted-Lowry acid
Proton donor.
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Bronsted-Lowry base
Proton acceptor.
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Alkali
Base that dissolves in water forming OH- ions.
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Neutralisation
A chemical reaction in which an acid and a base react together to produce a salt and water.
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Acid-base pair
A pair of two species that transform into each other by gain or loss of a proton.
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Strong acid
An acid that completely dissociates in solution.
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Weak acid
An acid that partially dissociates in solution.
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Buffer solution
A mixture that minimises the change in pH on addition of small amounts of acid or base.
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Equivalence point
The point in a titration at which the volume of one solution has reacted exactly with the volume of the second solution.
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End point
The point in a titration at which there are equal concentrations of the weak acid and conjugate base form of the indicator.
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Enthalpy change of neutralisation
Enthalpy change when solutions of an acid and an alkali react together to produce 1 mole of water under standard conditions.
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Other cards in this set

Card 2

Front

The change in concentration of a reactant, or product, when t=0.

Back

Initial rate of reaction

Card 3

Front

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

Back

Preview of the back of card 3

Card 4

Front

Sum of the individual orders.

Back

Preview of the back of card 4

Card 5

Front

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

Back

Preview of the back of card 5
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