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# A TLC platc has twp sides , clear side and rough side wth solid caatings. (a) What two chemicals are most typically used as the solid coatings (the stationary phase...

## Question

###### A TLC platc has twp sides , clear side and rough side wth solid caatings. (a) What two chemicals are most typically used as the solid coatings (the stationary phase) (0) What is the mobile phase ad its purpose?One of the steps involved running TLC analysis spot samples on the prate. dull pencil used to gently mark the locations of the spots (a) Why should an ink pen rot be used? () Wy should the spots be kept as small as possible?After the samples are spolted, the plate be "developod"

A TLC platc has twp sides , clear side and rough side wth solid caatings. (a) What two chemicals are most typically used as the solid coatings (the stationary phase) (0) What is the mobile phase ad its purpose? One of the steps involved running TLC analysis spot samples on the prate. dull pencil used to gently mark the locations of the spots (a) Why should an ink pen rot be used? () Wy should the spots be kept as small as possible? After the samples are spolted, the plate be "developod" using developing solvent . The amount ol solvent is important (a) What is the pronlem wilh too much or too little solvent? (b) pece of filter paper is also inserted Into the developing chamber keep the chamber saturated vath the solvent vapor Wnat does achieve? while the plate the solvent (it is being developed); the analyte molecules are attracted the TLC coating (whte solid) but the solvent molecules are moving up by capillary action trying to Tpush" the analyte molecules Tn2 Tpush" the solvent [ealed its polarity We wll use mxture uowalos powver hexanes and ethyl acetate a5 our developing solvent (a) What functional groups ethyl acetale ~ (b) Hexanes are non-polar while moderately polar What property the sclvent good aceta e measurement of its polarity ? Provide ethyt numencal vaues substantiate your answet

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