2which of the two dye molecules is more polar briefly

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2.Which of the two dye molecules is more polar? Briefly explain your answer (point form), by making reference to the evidence obtained during this experiment. 3.The surface of the alumina stationary phase contains many O-H groups. Given that fluorescein also contains an O-H group, what is the dominant , specific intermolecular force that attracts the fluorescein to the alumina? Think back to first year! 4.Butanol is an organic solvent that is similar to ethanol, except it contains a longer hydrocarbon chain (its condensed structure is CH 3 CH 2 CH 2 CH 2 OH). How would you predict the R f values of the two dyes to change if butanol were used instead of ethanol for either of the two above experiments? Explain briefly in point form. Based on the experiment . Fluoro scene is more polar than others . since the more polar of the molecules will be stronger to bind on the plate . furthermore , the speed is also slower than the less polar molecules due to the strength of molecule to the adsorbent TLC 's plate There will be having : " Hydrogen - Bonding " as the dominant Intermolecular Force in this case H H H H H H l l l l l l Ethanol : H - C - C - OH vs . Butanol : H - C - C - C - C - IH l l l l l l ' ' H H H H H H more polar less polar when using Butanol instead Ethanol , it will be causing : . Fluorescein will not move further since lack of polarity of the solvent . Rf = attd distance solvent front Hence , the shorter Fluorescein travelled distance will be , the smaller Rf value is .

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