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Ask iit jee aieee pet cbse icse state board community Community Discussion Question: Kjeldahlising a compound?
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rash29 (0)

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What is meant by Kjeldahlising a Compound?
    
tarinbansal (3937)

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Well kjehladahl is a method for estimation of elements, Nitrogen I think, I dont remember well.

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madmax (427)

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Ya I think Tarin is right
The Kjeldahl method is a method to determine the quantity of N in a cpd.

So I guess
Kjeldahlising a Compound means either finding the quantity of N in it or carrying out the Kjeldahl method on the given cpd.

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For more on the Kjeldahl method:
http://en.wikipedia.org/wiki/Kjeldahl_method
http://www.coleparmer.com/techinfo/techinfo.asp?htmlfile=KjeldahlBasics.htm

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budku007 (502)

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This method is basically used for quantitative analysis of organic compounds

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tarinbansal (3937)

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It is used only for N not for all organic compounds.

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sowjanya_reddygudipati (73)

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kjeldahls methodis used to determine nitrogen content in organic compounds in which nitrogen is attached to cabron and hydrogen (bt not in azo,nitro and azoxy)
principle:nitrogen is heated with conc sulphuric acid in copper sulphate which converts it into ammonium sulphate . this ammonium sulphate is treated with excess of alkali which decomposes to ammonia from which nitrogen content is calculated.
catalyst used is coppersulphate and mercury .
potassium sulphate is also added to raise the boiling point of sulphuric acid.
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