3.4.3 Acids and Bases

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  • Created by: Jade
  • Created on: 11-05-13 12:35
Bronsted-Lowry
An acid is a proton donor ( HA----- H+ + A-) and a base is a proton acceptor (B + H+---------------- BH+)
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Conjugate base of an acid
is the proton acceptor once the acid has donated a proton
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Conjugate Acid of a base
Proton donor formed once the base accepts a proton
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Define pH
A measure of the concentration of hydrogen ions (protons) in solution and is used as a measure of the acidity or basicity of an aqeuos solution.
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Weak Acid
An acid that dissociates incompletely, releasing only some of its hydrogen atoms into the solution. Thus, it is less capable than a strong acid of donating protons.
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Weak Base
A base that does not fully ionise in solution (protonation is incomplete)and therefore does not accept protons as well as a strong base.
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Amphiprotic
Can act as both a base and an acid. e.g. water
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Acid Dissociation Constant, Ka
is the equilibrium constant for the reaction in which a weak acid is in equilibrium with its conjugate base in aqueous solution.
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Monotropic Acid
An acid that donates one proton per molecule to an aqeous solution.
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A diprotic Acid
An acid that donates two protons per molecule to an aqeuous solution.
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Indicator
Weak organic acids that are different in colours in their undissociated form and in the dissociated base.
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Buffer
Is in aqeuous solution whose pH is resistant to change on the addition of relativley small qunatities of an acid or base.
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An acidic Buffer
Conists of a weak acid mixed with a strong base and it maintains the pH below 7.
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Other cards in this set

Card 2

Front

Conjugate base of an acid

Back

is the proton acceptor once the acid has donated a proton

Card 3

Front

Conjugate Acid of a base

Back

Preview of the front of card 3

Card 4

Front

Define pH

Back

Preview of the front of card 4

Card 5

Front

Weak Acid

Back

Preview of the front of card 5
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