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VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Chemistry => Topic started by: Lols123 on May 22, 2011, 12:34:42 pm

Title: quick questions
Post by: Lols123 on May 22, 2011, 12:34:42 pm

1) How do you tell what/how many bonds are in a fatty acid?
e.g. how can you tell that linolenic acid has a 3 carbon double bonds

(More to come)

Title: Re: quick questions
Post by: luken93 on May 22, 2011, 12:43:29 pm

Use the formula CnH2nO2 or CnH(2n+1)COOH

If it satisfies that equation, there are no double bonds present. For every double bond, 1 hydrogen is lost from each side of the double bond - hence for every double bond 2 hydrogens are lost.

Title: Re: quick questions
Post by: Lols123 on May 24, 2011, 07:57:04 am

thanks
having troubles with this one :S i got a, but cant seem to get b right..
im always off by one carbon atom when i write out the equation...