chem unit 2.5

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  • Created by: Skaters
  • Created on: 21-04-18 19:03
Observations for reaction of zinc and hydrochloric acid
1. fizzing 2. zinc disappears 3. exothermic
1 of 8
hydrogen and oxygen's observations
burns with clear blue flame producing water vapour, which may condense to form a colourless liquid on glass.
2 of 8
observations on hydrogen reducing copper (II) oxide
black CuO changes to pink and condensation appears.
3 of 8
advantages of using hydrogen as a fuel
1. Clean 2. Fuel cell is safe 3. Make it with renewable energy
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disadvantages of using hydrogen as a fuel
1. expensive 2. high emissions of CO2 in electrolysis 3. process of condensation & keeping hydrogen under pressure is energy intensive 4. metal containers are not suitable as they will leak 5. Initial cost of distribution system=huge 6. Damages ozone
5 of 8
Reaction of carbon dioxide and water
It forms carbonic acid. The acid cannot be isolated from the solution so it is written as CO2 (aq).
6 of 8
Reaction of carbon dioxide and burning magnesium
A bright, white light, white solid produced, black specks of carbon.
7 of 8
Reaction of carbon dioxide and sodium hydroxide
solid white sodium carbonate.
8 of 8

Other cards in this set

Card 2

Front

hydrogen and oxygen's observations

Back

burns with clear blue flame producing water vapour, which may condense to form a colourless liquid on glass.

Card 3

Front

observations on hydrogen reducing copper (II) oxide

Back

Preview of the front of card 3

Card 4

Front

advantages of using hydrogen as a fuel

Back

Preview of the front of card 4

Card 5

Front

disadvantages of using hydrogen as a fuel

Back

Preview of the front of card 5
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