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22 Cards in this Set
- Front
- Back
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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, per unit time at the start of the reaction when t=0 |
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The order of a reactant |
The power to which the concentration of the reactant is raised in the rate equation. |
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The overall order |
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 of a reactant |
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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The 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 in the overall equation. |
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Homogenous equilibrium |
An Equilibrium in which all the species making up the reactants and products are in the same physical state. |
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Heterogamous 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 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 bare react together to produce a salt and water. |
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Acid-Base pair |
A pair of 2 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 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. |
