1- Is there a difference between the TLC of the crude and recrystallized in terms of Z/E products? 2- Even though a 1H NMR was not obtained for your product, propose how you could distinguish Z-Stilbene from E-Stilbene using 1H NMR.

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Electrical charges of ionic bonds

The reaction 2kalsi3o8 + 2(h+ + hco3-) + h2o  →  al2si2o5(oh)4 + 2k+ + 2hco3- + 4sio2 shows that feldspar kalsi3o8 is chemically altered by hydrolysis to form chalky-looking clay mineral kaolinite al2si2o5(oh)4. the chemical breakdown of potassium feldspar due to exposure to acidic water results to the mineral binding with the water molecule to become kaolinite with silica and potassium and bicarbonate ions in solution.