Wednesday, 15 May 2013

3.1 explain the terms homologous series, hydrocarbon, saturated, unsaturated, general formula and isomerism.

Compounds in the same homologous series have the same general formula and similar chemical properties.

A hydrocarbon is a compound made up only of hydrogen and carbon.

Saturated means something has bonded as many time as possible. Unsaturated means that more bonds can be made.

General formula is the most simplified the ratio of molecules can be.

Isomers have the same general formula but different structures.
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17 comments:

  1. Unknown29 August 2014 at 03:30

    "A hydrocarbon is a compound". Technically, a single hydrocarbon (as you are talking about here) is a MOLECULE.

    Hydrocarbons (note; it is plural) are COMPOUNDS made up of hydrogen and carbon only.

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    1. hh12342 December 2014 at 10:18

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    2. Tabby M22 March 2016 at 06:09

      thank you

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    3. Anonymous2 April 2016 at 06:32

      sucha whore tabby , thanking everyone

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    4. Unknown20 December 2017 at 11:07

      Yusuf, I've ready through these all for two years and I still can't get over how much of an arsehole you can be, not only disrespecting Hannah here for helping out but also everyone who thanks her. Grow up.

      Delete
  2. Unknown29 August 2014 at 03:56

    "General formula is the most simplified the ratio of molecules can be." What you have described is an empirical formula. A general formula is a formula from which you can deduce the molecular formula of a molecule.

    For example, the general formula for an Alkane is CnH2n+2. From this we can get the molecular formula of any molecule of alkane, such as propane. Propane has 3 carbon atoms, so there are (2 x 3) + 2 = 8 hydrogens. So the molecular formula for propane is C3H8.

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    1. Anonymous2 December 2014 at 10:20

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    2. hh12342 December 2014 at 10:23

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    3. Tabby M22 March 2016 at 06:09

      thank you

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  3. hh12342 December 2014 at 10:13

    This comment has been removed by the author.

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    1. Anonymous2 December 2014 at 10:18

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    2. hh12342 December 2014 at 10:19

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  4. Unknown19 February 2015 at 01:42

    Isomers are molecules with the same molecular formula but with different structural formulae

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  5. Studyyyygirl10 May 2015 at 10:04

    your blog is perfect. cannot thank you enough. THANK YOU x100000000000000

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  6. Unknown19 November 2015 at 09:22

    Saturated is this sense means there is the most amount of hydrogen bonded to the carbon atoms, an organic chemical that is un-saturated has a double bond so is an alkane meaning if an addition reaction occurs more hydrogen could be added

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  7. Anonymous4 May 2016 at 21:53

    Doesn't saturated mean single bonds only, and unsaturated is double/triple bonds?

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