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Ch9 Acids And Alkalis > 9.4 Corrosive Nature Of Acids > Flashcards

9.4 Corrosive Nature Of Acids Flashcards

1
Q

What metals react w dilute hydrochloric acid
What doesn’t

A

Magnesium, aluminium, iron, zinc
Copper doesn’t

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2
Q

What is produced during the reaction of acids and metals

A

A salt and hydrogen

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3
Q

How do we test for hydrogen

A

Burning splint over test tube containing hydrogen, burns w pop sound

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4
Q

What happens to the metal when it reacts w acid

A

Size decreases slightly; acid corrodes metal

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5
Q

Why cant we place acidic drinks in metal containers

A

Acid will corrode metal container

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6
Q

Word equation for the reaction between acid and metal

A

Acid + metal —> salt + hydrogen

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7
Q

What do acids react w besides metal

A

Calcium carbonate

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8
Q

What building materials contain calcium carbonate

A

Limestone, marble

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9
Q

What is produced in the reaction of acid and calcium carbonate

A

A salt, carbon dioxide, water

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10
Q

How to know carbon dioxide is produced in the reaction

A

Limewater turns milky when mixed w co2

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11
Q

Why should we avoid using acidic cleaners to clean some surfaces

A

Marble kitchen tops/windowsills, acids corrode material

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12
Q

What else contains calcium carbonate

A

Pearls, seashell, eggshell

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13
Q

Word equation for reaction between acids and carbonates

A

Acid + carbonate —> salt + carbon dioxide + water

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14
Q

What’s considered to be acid rain

A

Naturally acidic, 5.6
More acidic than it shd be

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15
Q

Acid rain causes

A

Human activities: burning fossil fuels

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16
Q

What does burning fossil fuels release

A

Air pollutants
sulphur dioxide, nitrogen oxides

17
Q

Process of acid rain

A
  1. Acidic gases (sulphur dioxide, nitrogen oxides) releases into atmosphere
  2. Acidic gases dissolve in water droplets, form acids
  3. Acid rain falls
18
Q

Acidic gases make _____ more acidic, ______ is formed.

A

Rainwater
Acid rain

19
Q

How acid rain spread + impact

A

Wind over long distances; damage not only to where acidic gases come fr
Problem for everyone

20
Q

3 effects of acid rain

A

Corrode metal objects and building materials
Damage plants
Harm aquatic life

21
Q

What does acid rain corrode specifically

A

Iron fences, bridges, motor car bodies
Building materials, metal/marble statues

22
Q

How does acid rain damage plants

A

Destroy leaves directly, X photosynthesis

Rain dissolves, wash away soil nutrients, grow slow/die

Soil acidity ^ ; X grow well in acidic soil

23
Q

How does acid rain harm aquatic life

A

River, lakes > water acidity ^ ,, X survive

Dissolve minerals, wash out of soil —> river, lakes
harmful minerals slow growth, reproduction

24
Q

Explain how acid rain is formed

A

Acidic gases like sulphur dioxide and nitrogen oxides are dissolved in rainwater

Ch9 Acids And Alkalis (5 decks)

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