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Flashcards in Acids and Bases Deck (103)
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1

Arrhenius Acid

A substance that dissociates in water to produce H⁺ ions

2

Arrhenius base

A substance that dissociates in water to produce OH⁻ ions

3

Bronsted Lowry Acid

A proton [H⁺] donor

4

Bronsted Lowry Base

A proton [H⁺] acceptor

5

Neutralisation

The reaction between an acid + a base
forming a salt + water

6

Conjugate Acid

formed when a base accepts a proton

7

Conjugate Base

formed when an acid donates a proton

8

Conjugate pair

an acid + a base that differ by a proton

9

Primary standard

Substance of high Mr (Relative Molecular Mass) which can be obtained in a pure stable soluble solid form
-so it can be weighed out
-dissolved in water to give a soln of accurately known conc

10

Titration

laboratory procedure where measured vol of one soln is added to a known vol of another soln until reaction is complete

11

pH formula

pH = -log[H⁺]

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Kw

Kw = [H⁺] . [OH⁻]

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[H⁺]

[H⁺] = √Kw

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Strong acid

good proton donor

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Weak acid

weak proton donor

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Strong base

good proton acceptor

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Weak base

poor proton acceptor

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indicator

an acid base indicator is a substance that changes colour according to the pH of the soln

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Methyl orange

in acid: red
in base: yellow
range: pH 3-5

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Phenolphthalein

in acid: colourless
in base: pink
range: pH 8-11

21

Litmus

in acid: red
in base: blue
range: pH 5-8

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Indicator for: strong acid/base

methyl orange
phenolphthalein
litmus

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Indicator for: strong acid/weak base

methyl orange

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Indicator for: weak acid/strong base

phenolphthalein

25

Indicator for: weak acid/weak base

none

26

Solution

a completely perfect mixture of a solute and solvent, where particles of the solute are uniformly distributed throughout the solven

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concentration

amount of solute that is dissolved in a given volume of soln

28

molarity

the number of moles of solute per litre of soln

29

No. of moles formula

volume x molarity
/
1000

or

mass / Mr

30

No of moles in diluted and conc soln

[ Vol(dil) x M(dil) ] / 1000 = [ Vol(conc) x M(conc) ] / 1000