Oxygen and Oxides

Daniel Brener
Mind Map by , created about 6 years ago

IGCSE Edexcel Chemistry (Chemistry of the elements) Mind Map on Oxygen and Oxides, created by Daniel Brener on 09/26/2013.

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Daniel Brener
Created by Daniel Brener about 6 years ago
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Oxygen and Oxides
1 Laboratory preparation of...
1.1 Oxygen
1.1.1 Note: Gas collected by downward displacement of water
1.1.2 Test for Oxygen = 'Glowing Splint Relights'
1.1.3 Catalyst in this reaction was manganese oxide, MnO2
1.2 CO2
1.2.1 Marble chips (CaCO3) reacted with Hydrochloric acid (HCl)
1.2.1.1 Gas was evolved (it effervesced/bubbled)
1.2.1.1.1 Gas was poured (CO2 is heavier than air) into limewater
1.2.1.1.1.1 (On shaking the test tube) Limewater turns cloudy
2 Gases in the Air
2.1 Nitrogen - 78%
2.2 Oxygen - 21%
2.3 CO2 - 0.04%
2.4 Argon - 0.09%
2.5 Other - 0.06%
2.6 To determine the volume of oxygen in the air...
2.6.1 1) Heat Cu fillings in tube.
2.6.1.1 2) Pass the air over them using the syringes
2.6.1.1.1 3) Once the Cu turnings/fillings have turned black measure the volume of air left
2.6.1.1.1.1 For the next step see the note attached

Annotations:

  • Do the following maths:  initial volume minus the final volume divided by the initial volume mulitiplied by 100 = the volume by percentage of oxygen
3 Carbon dioxide
3.1 General Stuff To Know About CO2
3.1.1 Colurless, odourless, gas
3.1.2 Denser than air (smothers fires)
3.1.3 Does not support combustion (fire exinguishers)
3.1.4 Dissolves in water, to form an acidic solution
3.2 Uses
3.2.1 Carbonated Drinks
3.2.1.1 Added to the drinks under pressure so that it dissolved in the liquid and then fizzes out when the can is opened (pressure is releases
3.2.2 Fire Extinguishers
3.2.2.1 Denser than air so it settles around the fire and displaces the oxygen from the area.
3.2.2.2 As CO2 does not burn the fire is put out

Annotations:

  • Unless its an Mg fire!!!!
3.3 You need to know: 'CO2 is a greenhouse gas, and thus contributes to global warming.'
4 Thermal Decomposition of Carbonates
4.1 Compound breaking down when heated.
4.2 Examples (you need to know)
4.2.1
4.2.2 Calcium Carbonate
4.2.3 Copper(II) Carbonate
4.2.4 Copper(II) Carbonate
5 Reactions with Oxygen in the Air
5.1 Magnesium (Mg)
5.1.1 Burns as a bright white flame
5.1.2 White powdery ash is formed (MgO)
5.2 Carbon (C)
5.2.1 Burns with a yellow flame
5.2.2 Produces a colourless gas CO2
5.3 Sulfur (S)
5.3.1 Burns with a bright blue flame
5.3.2 Produces a colourless gas SO2