To purify caffeine (from black tea), the isolated material (crude caffeine) was subjected to sublimation. If we consider that the aqueous tea extract contained caffeine, gallic acid and chlorophyll, what impurities may we be removing at this stage of the experiment? Briefly explain.

Percent ionization for a weak acid (ha) is determined by the following formula: percent ionization=[ha] ionized[ha] initial×100%for strong acids, ionization is nearly complete (100%) at most concentrations. however, for weak acids, the percent ionization changes significantly with concentration. the more diluted the acid is, the greater percent ionization.a certain weak acid, ha, has a ka value of 9.4×10? 7.part acalculate the percent ionization of ha in a 0.10 m solution.part bcalculate the percent ionization of ha in a 0.010 m solution