Flashcards
Making polymers
Flashcards do conjunto (25)
- 1What is a hydrocarbon?A hydrocarbon is a compound of carbon and hydrocarbon atoms only.
- 2What are alkanes?Alkanes are hydrocarbons that have single covalent bonds only.
- 3What are alkenes?Alkenes are hydrocarbons that have a double covalent bond between carbon atoms. Double bonds involve two shared pairs of electrons.
- 4What is a covalent bond?A covalent bond is a bond between atoms where an electron pair is shared.
- 5Why is Propane (C3H8) a hydrocarbon?Propane (C3H8) is a hydrocarbon because it is C and H atoms.
- 6Draw the displayed formula for Propane.H H H
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H - C - C - C - H
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H H H - 7Why is Propanol (C3H7OH) not a hydrocarbon.Propanol (C3H7OH) is not a hydrocarbon because it contains an oxygen atom.
- 8Draw the displayed formula for Propanol.H H H
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H - C - C - C - OH
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H H H - 9Why is Propene (C3H6) a hydrocarbon and an alkene?Propene (C3H6) is a hydrocarbon because it contains only C and H atoms. It is an alkene because it has a double covalent bond between carbon atoms.
- 10Propene is also what?Propene is also a monomer. Poly(propene) is the polymer.
- 11What is used to test for an alkene?Bromine water is used to test for an alkene.
- 12What happens when orange bromine water is added to an alkene?When orange bromine water is added to an alkene it turns colourless (decolourises).
- 13What does a saturated compound have?A saturated compound only has single covalent bonds between carbon atoms. Alkanes are satured. They have no double bonds between carbon atoms.
- 14What does an unsaturated compound have?An unsaturated compound has at least one double covalent bond between carbon atoms. Alkenes are unsaturated. They have C=C double bond.
- 15What is addition polymerisation?Addition polymerisation is the process in which many alkene monomers react to give a polymer.
- 16What does this reaction need?This reaction needs high pressure and a catalyst.
- 17You can recognise a polymer from its displayed formula by looking out for what?You can recognise a polymer from its displayed formula by looking out for the following: a long chain, the pattern repeating every two carbon atoms, two brackets on the end with extended bonds through them, an 'n' after the brackets.
- 18Draw the displayed formula for poly(ethene).H - H - H - H - H - H
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-[-C - C - C - C - C - C-]-
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H - H - H - H - H - H n - 19Fill in the gaps: The displayed formula of an ........ polymer can be constructed when the displayed formula of its ....... is given.The displayed formula of an addition polymer can be constructed when the displayed formula of its monomer is given.
- 20Fill the gaps: The displayed formula of a ....... can be constructed when the displayed formula of its ........ polymer is given.The displayed formula of a monomer can be constructed when the displayed formula of its addition polymer is given.
- 21Draw the displayed formula of the ethene monomer.
- 22What is made during an addition polymerisation reaction?During an addition polymerisation reaction a long chain is made until it is stopped.
- 23What is this long molecule that made called?This long molecule is poly(........)
e.g. poly(ethene) - 24What does the reaction cause?The reaction causes the double bond in the monomer to break and each of the two carbon atoms forms a new bond.
- 25What does additional polymerisation involve?Additional polymerisation involves the reaction of many unsaturated monomer molecules (alkenes) to form a saturated polymer.
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- GCSE Science Year 10 FlashCards sobre Making polymers, criado por annjb2898 em 18-05-2014.
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