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.

16 comments:

  1. "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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    2. sucha whore tabby , thanking everyone

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  2. "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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  4. Isomers are molecules with the same molecular formula but with different structural formulae

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

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