5. Acids, Bases and Salts Flashcards

1
Q

pH of acids

A

Below 7

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2
Q

pH of neutral

A

7.0

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3
Q

pH of alkalis

A

Above 7

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4
Q

Difference between alkalis and bases

A

Alkalis are soluble bases

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5
Q

Colour chart for UI

A
pH 1-2 = red
pH 3-4 = orange
pH 5-6 = yellow
pH 7 = green
pH 8-9 = blue-green
pH 10 = blue
pH 11-14 = purple
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6
Q

Other indicators

A

Methyl orange, phenolphthalein

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7
Q

Colour change in phenolphthalein

A
Acid = colourless
Alkali = pink
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8
Q

Colour change in methyl orange

A
Acid = red
Alkali = orange
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9
Q

Formula of hydrochloric acid

A

HCl

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10
Q

Formula of nitric acid

A

HNO3

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11
Q

Formula of sulfuric acid

A

H2SO4

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12
Q

Difference between hydrogen chloride and hydrochloric acid

A

Hydrogen chloride is a gas - HCl(g). It has covalent bonding. When dissolved in water HCl(aq) it becomes an acid and releases H+ ions

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13
Q

Arrhenius definition of an acid

A

Substance that releases H+ ions in water

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14
Q

Bronsted Lowry definition of an acid

A

proton (H+ ion) donor

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15
Q

Arrhenius definition of an alkali

A

Substance that releases OH- ions in water

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16
Q

Bronsted Lowry definition of an alkali

A

proton (H+ ion) acceptor

17
Q

Definition of a strong acid

A

Fully dissociates in water e.g. HCl –> H+ + Cl-

18
Q

Definition of a weak acid

A

Only partially dissociates in water e.g HF <=> H+ + F-

19
Q

Which metals react with acids?

A

Those above hydrogen in the reactivity series. (not Cu, Ag, Au)

20
Q

Products of acid and metal

A

salt and hydogen

21
Q

acid and metal carbonate produces

A

salt + water + carbon dioxide

22
Q

acid + alkali

A

salt + water

23
Q

acid + ammonia

A

salt

24
Q

ionic equation for neutralisation

A

H+ + OH- –> H2O

25
Q

ionic equation for acid and metal carbonate

A

H+ + CO3 2- –> H2O + CO2