[shelley]

The lab assistant was talking very fast, and I had to quickly write down the observation info. I would like to know if I recorded the correct observation and inference data for the Experiment or reaction on "Iodoform Test and Acetophenone", below? Thank you.
Acetophenone

   Observation:Bright yellow solution with solid suspended in bottom. No yellow ppte. When mixed there is a deep dark yellow ppte.   

Inference: Positive rxn. Presence of methyl ketone. There are two liquid phases and ppte was formed.

[shelley]

Hi,

In the chemical rxn of Iodoform Test and 2-butanol do I have the correct observation and inference, below?  For the equation of the reaction should I draw the ring structure of the impurities in my lab report/write up?

Observation:   Turned cloudy with yellow ppte.
   
Inference: Positive rxn.  False positive test for methyl ketone.  Oxidizing agent positive results  can be interpreted as oxidized to methyl ketone:oxidizing agent effect.  When exposed to air solution was oxidized to form methyl ketone, so impurities are present.

[Arkcon]

Wikipedia has a description of the reaction here:  http://en.wikipedia.org/wiki/Iodoform_test#Iodoform_test  But either you've seen it in the lab, or you haven't.

[Vidya]

Wikipedia has a description of the reaction here:  http://en.wikipedia.org/wiki/Iodoform_test#Iodoform_test  But either you've seen it in the lab, or you haven't.

Hi,

In the chemical rxn of Iodoform Test and 2-butanol do I have the correct observation and inference, below?  For the equation of the reaction should I draw the ring structure of the impurities in my lab report/write up?

Observation:   Turned cloudy with yellow ppte.
   
Inference: Positive rxn.  False positive test for methyl ketone.  Oxidizing agent positive results  can be interpreted as oxidized to methyl ketone:oxidizing agent effect.  When exposed to air solution was oxidized to form methyl ketone, so impurities are present.

In this reaction you are using 2-butanol and carrying out iodoform test in which NaOH(or KOH) is mixed with CHI3.This solution is going to give a strong oxidizing agent which  oxidizes 2- butanol to 2-Butanone.CH3CH2CH2COCH3
it is a methy ketone and thats the reason you are getting a positive idoform test