9.4 Corrosive Nature Of Acids Flashcards
What metals react w dilute hydrochloric acid
What doesn’t
Magnesium, aluminium, iron, zinc
Copper doesn’t
What is produced during the reaction of acids and metals
A salt and hydrogen
How do we test for hydrogen
Burning splint over test tube containing hydrogen, burns w pop sound
What happens to the metal when it reacts w acid
Size decreases slightly; acid corrodes metal
Why cant we place acidic drinks in metal containers
Acid will corrode metal container
Word equation for the reaction between acid and metal
Acid + metal —> salt + hydrogen
What do acids react w besides metal
Calcium carbonate
What building materials contain calcium carbonate
Limestone, marble
What is produced in the reaction of acid and calcium carbonate
A salt, carbon dioxide, water
How to know carbon dioxide is produced in the reaction
Limewater turns milky when mixed w co2
Why should we avoid using acidic cleaners to clean some surfaces
Marble kitchen tops/windowsills, acids corrode material
What else contains calcium carbonate
Pearls, seashell, eggshell
Word equation for reaction between acids and carbonates
Acid + carbonate —> salt + carbon dioxide + water
What’s considered to be acid rain
Naturally acidic, 5.6
More acidic than it shd be
Acid rain causes
Human activities: burning fossil fuels
What does burning fossil fuels release
Air pollutants
sulphur dioxide, nitrogen oxides
Process of acid rain
- Acidic gases (sulphur dioxide, nitrogen oxides) releases into atmosphere
- Acidic gases dissolve in water droplets, form acids
- Acid rain falls
Acidic gases make _____ more acidic, ______ is formed.
Rainwater
Acid rain
How acid rain spread + impact
Wind over long distances; damage not only to where acidic gases come fr
Problem for everyone
3 effects of acid rain
Corrode metal objects and building materials
Damage plants
Harm aquatic life
What does acid rain corrode specifically
Iron fences, bridges, motor car bodies
Building materials, metal/marble statues
How does acid rain damage plants
Destroy leaves directly, X photosynthesis
Rain dissolves, wash away soil nutrients, grow slow/die
Soil acidity ^ ; X grow well in acidic soil
How does acid rain harm aquatic life
River, lakes > water acidity ^ ,, X survive
Dissolve minerals, wash out of soil —> river, lakes
harmful minerals slow growth, reproduction
Explain how acid rain is formed
Acidic gases like sulphur dioxide and nitrogen oxides are dissolved in rainwater
