F325 Definitions

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  • Created by: BryonyF
  • Created on: 20-03-14 16:40
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, per unit time at the start of the reaction when t=0.
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The order of a reaction with respect to a reactant
The power to which the concentration of the reactant is raised in the rate equation.
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The overall order of a reaction
The sum of the individual orders.
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The 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.
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Half-life
The time taken for the concentration of the reactant to reduce by half.
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Reaction mechanism
A series of steps that, together, make up the overall reaction.
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Rate-determining step
The slowest step in the reaction mechanism of a multi-step reaction.
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Intermediate
A species formed in one step of a multi-step 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 species making up the reactants and products are in different physical states.
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Bronsted-Lowry acid
A proton, H+, donor
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Bronsted-Lowry base
A proton, H+, acceptor
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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 a solution.
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Weak acid
An acid that partially dissociates in water.
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Buffer solution
A mixture that minimises pH changes 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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Other cards in this set

Card 2

Front

The change in concentration of a reactant, or product, per unit time at the start of the reaction 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

The sum of the individual orders.

Back

Preview of the back of card 4

Card 5

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 5
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