Question

3) Show the calculations involved in determining the theoretical and percent yield for the reaction of 15.000 grams of salicylic acid with grams of acetie anhydride if the student isolated 9.807 grams of aspirin. 12.500 Salicylic Fw= 133.12gm CatOy +CH coot acetic Anh. Fw 102.04 C7HOS t Cy HO3 st 4) Which compound, aspirin or salicylic acid, would test positive with a 1% iron (II) nitrate solution? Explain your answer

3) Show the calculations involved in determining the theoretical and percent yield for the reaction of 15.000 g of show the calculations involved in determining the theoretical and percent yield for the reaction of 15.000 g of salute salicylic acid with 12.500 grams of acetic anhydride if the student isolated 9.807 grams of asprin.

4) Which compound, asprin or salicylic acid, would test positive with a 1% iron (II) nitrate solution? Explain.

Answer 1

.-c-cus [-oh Salycilic acid Acetic anhydride Molti 138.121 g prole Mowt: 102.049 More Aspirin hint: 180.158 g noe. Reagent: Identification of thosto limiting .. Moleg of salycilic acid= weight long) powt . . 15 yng 138-12191 roce [1 More = 1000 proses? - 20.1086 Moleg og lof Ho Moles Moles of Acetic anhydride = weight Mout 2 1.5 grs 102.09 g/mole = 0.1994 Moles on 128.44 Mi Moles 17. Holes among the two Reactants, Salycilic acid har lere Holes thus salycilic acid is the limiting nts, sulycilic acid has leaf curber of

calculation of theoretical wield: (100 % yield): of 138-121 998 is are of salycilic salycilic and produces 180.158 978 of Aspinn acid produces a gms of Aspirin - 15x180-158 138.121 grs of Aspirin = 19.565 978 of Aspirin Theoretical yield (100) yield) = 19,565 978

t. of yield . calculation: . % of yield expentiental weight theoretical weight . 9.807. gme xico 196565 500124 yield=50012% it of

u salycilic acid ab give positive test with a It Fe(NO3)2 solution. Phenolic compounds gives positive test with Fe(NO3) solution thus salycific acid (has Phenolic finctional grow give positive that with rel ) Nitrate solution. Aspirin does not give positive rest with Fe(a) Nitrate solution.