Name Lab Time Based on the appearance of your TLC plates and Revalues did your s
ID: 1042622 • Letter: N
Question
Name Lab Time Based on the appearance of your TLC plates and Revalues did your sample contain aspirin? You must support your answer with evidence (3pts) 4. When we ry to Conpare our ospiin to thehe one and Te ircles mean we hod impure Produ ct so r migtht have Some Product Salicylic Aci Re Shows that there are different between the +u asPirin our asirin hos less bomple distance Traveled which also mcan we not avoaPure aspiri Compare the Rr values of aspirin on the two TLC plates. consistent? Can R, values be used to identify a chemical from two different plates (3pts)? 5. Are these values 6. Based on your observations how pure is your aspirin? You must provide evidence to support your answer (3pts).Explanation / Answer
5.
Rf value = distance traveled by compound ÷ distance traveled by solvent front
Measure the distance from the baseline where you initially made the spots of compounds.
6. As the TLC shows, there is some impurity in your aspirin (additional spots appeared beside the spot of actual compound) and most preferably it might be the unreacted salicylic acid (marked as S). This could be further justified by the FeCl3 test, as your product contains some undissolved compound like salicylic acid.
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