Describe and explain the possible effect on your results of the following experimental errors. A) You allowed your chromatogram to develop too long, and you couldn't find the solvent front.
B) The lab assistant who prepared the developing solvent mistakenly used aqueous amine nia in place of acetic acid.
C) You used an open ended melting po! capillary rather than a Drummond Microcap to apply the spots.
D) You marked the starting line with a ballpoint pen.

)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.