A mixture of n-heptane, tetrahydrofurane, 2-butanone, and n- propanol elutes in this order when using a polar stationary phase such a Carbowax. The elution order is exactly the opposite when using a nonpolar stationary phase such as polydimethylsiloxane. Explain the order of elution in each case. 1 The molar solubility of pbBr2 is 0.01M. Calculate ksp for pbBr2. 2 The cell (Ag/AgCl ref // S04-2, PbSO4(s)/Pb) was found to have a potential of -0.561V. Calculate the concentration of SO4-2 in the cell given: PbSO4(s) + 2e-Pb(s) + SO4-2 E= -0.350 Note: E Ag/Agci ref = 0.1970 3 Why it's not necessary to use Quartz cuvette in this experiment? 4 1-Write the full words for the following acronyms: VR: ISC: EC: 5 What is the difference between the excitation and emission spectrum? G 6