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Chemistry > Using Recources > Flashcards

Using Recources Flashcards

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1
Q

What are natural resources used for from the earth ?

A

Fuel for warmth

Building

Food

Transport

Clothing

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2
Q

What does sustainable mean ?

A

Making sure something is usable for the next generation and is safe for the future

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3
Q

What is bad about finite resources ?

A

They’re unsustainable

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4
Q

What is good about renewable resources ?

A

They’re sustainable for the future

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5
Q

What is potable water ?

A

Safe to drink but not pure

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6
Q

What does it mean when the water is not pure ?

A

More than one element present in it

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7
Q

How to produce potable water ?

A

Filtration of big particles

Sterilising

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8
Q

What are the three sterilisation methods for water ?

A

chlorine, ozone and uv

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9
Q

How can you make potable water from sea water ?

A

Reverse osmosis or distillation

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10
Q

How do you do distillation ?

A

heat until it boils, The salt remains in the liquid, and the steam is pure water. The steam is cooled and condensed to make potable water.

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11
Q

How do you do reverse osmosis ?

A

Water is put under high pressure and passed through a membrane which has tiny pores this prevents harmful ions getting through

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12
Q

What are the 4 steps for water treatment method ?

A
  1. screening and grit removal to remove large particles
  2. sedimentation allows tiny particles to settle out from still water, which produces sewage sludge and effluent (the liquid which remains on top)
  3. the sewage sludge is digested anaerobically by specific bacteria
  4. the effluent is treated with aerobic bacteria to reduce the volume of solid waste
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13
Q

What’s the method for the water purification practical ( 3 steps )?

A
  1. For each sample of water you are given, test the pH using either a pH meter or universal indicator and an appropriate colour chart. Record your observations carefully.
  2. For each sample of water, pour 50 cm3 into a clean pre-weighed evaporating basin. Heat gently over a Bunsen burner, tripod and gauze until no liquid remains.
  3. Allow to cool, then weigh the evaporating basin again and calculate the mass of solid that remains in the evaporating basin.
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14
Q

What’s the 4 steps of the life cycle assessment ?

A
  1. Extraction of raw materials
  2. Manufacturing of product
  3. Use of product
  4. Disposal of product
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15
Q

What are some ways of extracting raw materials ?

A

Quarrying and mining

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16
Q

Down sides of extraction of raw materials ?

A

Damage to habitats

17
Q

Why is recycling important ?

A

Prevents pollution

Sustainable for natural resources that are finite

18
Q

What is phytomining ?

A

The extraction of metal ores through growing of crops

19
Q

What’s are the steps of phytoming ?

A
  1. Plants that absorb metal ores are grown
  2. Plants grow absorbing metal ores
  3. Plants are harvested then burnt
  4. Collection of metal ores in the ash
20
Q

What is bioleaching ?

A

The use of chemicals to extract metal ores form the ground

21
Q

What’s the two factors of rusting ?

A

Air and water

22
Q

What is sand made from ?

A

Sand, sodium and limestone

23
Q

How do you make ammonia ?

A

A reversible reaction using nitrogen and hydrogen

24
Q

What is le chatelier’s principle ?

A

What ever you do to a reaction it will do the opposite

25
Q

What do fertilisers provide to plants ?

A

Mineral ions so they can grow meaning enhanced crop yield

26
Q

Explain how increasing pressure will affect the yield of NH3 ?

N2 + 3H2 <—-> 2NH3

A

Because of le chateliers principle the reaction will do the opposite so the pressure will decrease this means it will shift right as there is less

27
Q

Explain how decreasing pressure will affect the yield of NH3 ?

N2 + 3H2 <—-> 2NH3

A

Again because of le chateliers principle the reaction will do the opposite so it will increase pressure this means this will shift left as there is more

Chemistry (10 decks)

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