Question

5. Aspirin is produced by the reaction of salicylic acid (M = 138.1 g/mol) and acetic anhydride (M = 102.1 g/mol). CHO,() + C.H.O,(C) - C.H.O.(s) + C2H.O() If 5.00 R of C.H.O. (M = 180.2 g/mol) is produced from the reaction of 5.00 g CH.O, and 6.00 g C.H.Os, what is the percent yield? a) 11.6% b) 29.0% c) 59.9% (4) 68.8% e) 76.68% 4.6 Chemical Equations and Chemical Analysis o and MnSO4H2O has a mass of 2.005 g. After heating to drive off all the water 6. A mixture of MnSo, and MnSO4 4H2O has a mass of 2.005 g. Af the mass is 1.780 g. What is the mass percent of MnSO4-4H2O in the c) 65.3% b) 41.2% d) 69.6% a) 34.7% 2)88.8% 4,6 pH. A Concentration Scale for Acids and Bases c) 0.31 C) 0.51 e) 0.29 7. What is the pH of 0.77 M HCl(aq)? a)-0.09 b) 0.11 ) -0.48 M d) 1.7 x 10-M )1.4 10 M 8. Find the pH of a 3.02 M HCL solution a) 7.1 * 10Mb) 1.6 x 10- M C

Answer 1

CH603 + (UH603 Cg H8 ou + C2H4O2 0.036 mol sg mole of (7H603 - 138 g/ moi 0.058 mol mole of CuH603 = 6g 1025 mol since mole of cit603 a mole of cuH603 It means. C14603 is limiting reagent. Now mole ratio. 69 H804: C7H603 = 1.1 mole of cgH804 – mole of (GH603 = 0.036% mol Now theoretical field of cg Hooy = (0.036 mol ) x 1180.2g/mol) mth = 6.49 g Actual vier. Mactual = Sg 1 given) then it yield - x 100 mactual m theo. X 100 6.49