Calculate thelimiting reagent for this experiment, when 0.210g of SalicyclicAcid

Question

Calculate thelimiting reagent for this experiment, when 0.210g of SalicyclicAcid and 500 microliters of Acetic Anhydride are reacted. Pleaseexplain your answer step by step.

Explanation / Answer

salicylicacid (C7H6O3) + aceticanhydride (C4H6O3) -->aspirin(C9H8O4) + aceticacid (C2H4O2) 500 microlitre = 0.5mL = 0.5g n(Salicylic acid) =m/M = 0.210/138.118 = 0.001520mol n(acetic anhydride) = m/M = 0.5/102.088 = 0.004898mol Stoichiometry ratio = n(salicylic acid)/n(acetic anhydride) = 1/1 =1 Actual ratio = n(salicylic acid)/n(acetic anhydride)=0.00152/0.004898 = 0.3103 Actual ratio

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