Unit 5 - Rates, Equilibrium and pH Key Words

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  • Created by: Sofalof
  • Created on: 27-04-15 16:11
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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Order
The power to which the concentration of a reactant is raised in the rate equation
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Overall order
The sum of the individual orders
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Rate constant
The constant that links the rate of reaction raised to the power of their orders in the rate equation
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Half-life
The time taken for the concentration of a reactant to reduce by half
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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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Bronsted-Lowry acid
A proton donor
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Bronsted-Lowry base
A proton acceptor
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Alkali
A 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 eachother 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 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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End point
The point in a titration at which there are equal concentrations of the weak acid and conjugate base forms of the indicator
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Standard enthalpy change of neutralisation
The energy change that accompanies the neutralisation of an aqueous acid by an aqueous base to form one 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, 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 a 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 raised to the power of their orders in the rate equation

Back

Preview of the back of card 5
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