11.2.1

Drawing Displayed Formulae

Test yourself

Naming Organic Compounds and Drawing Displayed Formulae

Draw displayed formulae for methane, ethane, ethene, ethanol, ethanoic acid, and reaction products like CO2, H2O, and dibromoethane.

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Methane and ethane displayed formulae

  • Methane is the simplest alkane with one carbon atom.
    • Methane's formula is CH4.
    • Draw methane with carbon in the centre and four hydrogen atoms around it.
  • Ethane has two carbon atoms joined by a single bond.
    • Ethane's formula is C2H6.
    • Draw ethane showing two carbons connected and six hydrogens attached.
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Ethene displayed formula

  • Ethene is an alkene with two carbon atoms joined by a double bond.
    • Ethene's formula is C2H4.
    • Draw ethene showing the double bond between carbons.
  • Attach four hydrogens, two on each carbon.
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Ethanol and ethanoic acid displayed formulae

  • Ethanol is an alcohol with the formula C2H5OH.
    • Draw two carbons, five hydrogens, and an OH group attached.
  • Ethanoic acid is a carboxylic acid with the formula CH3COOH.
  • Draw ethanoic acid with a methyl group and the carboxyl group (COOH).
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Products of combustion and addition

  • Complete combustion of hydrocarbons produces carbon dioxide (CO2) and water (H2O).
    • Draw CO2 with carbon double-bonded to two oxygens.
    • Draw water (H2O) with oxygen bonded to two hydrogens.
  • Reaction of ethene with bromine forms dibromoethane (C2H4Br2).
    • Draw ethane structure with two bromine atoms replacing hydrogens.
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Products of fermentation reactions

  • Fermentation of sugars produces ethanol (C2H5OH) and carbon dioxide (CO2).
    • Draw ethanol and carbon dioxide displayed formulae as before.

Jump to other topics

1States of Matter

2Atoms, Elements & Compounds

3Stoichometry

4Electrochemistry

5Chemical Energetics

6Chemical Reactions

7Acids, Bases & Salts

8The Periodic Table

9Metals

10Chemistry of the Environment

11Organic Chemistry

11.1Formulae, Functional Groups & Terminology

11.2Naming Organic Compounds

11.3Fuels

11.4Alkanes

11.5Alkenes

11.6Alcohols

11.7Carboxylic Acids

11.8Polymers

12Experimental Techniques & Chemical Analysis

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