Question

S Ketone Aldehyde 9. Based upon the procedure given below, answer the following questions about the aldol condensation reaction: "In a clean 50 mL Erlenmeyer flask, add the ketone (0.5 g), aldehyde (2.0 mL), 95 % ethanol (10 mL) and 2 M aqueous sodium hydroxi de." Assume the aldehyde and ketone are the answers you provided in Question 8. a. Determine the limiting reagent for the above reaction. Only perform calculations on the organic reactants. Write out all calculations to obtain full credit. You must use the tables provi ded and the following atomic weights provided below. Atomic weights: C = 12.011 g/mol; H = 1.008 g/mol; O 15.999 g/mol; N = 14.007 g/mol

Answer 1

ED CHO cyclohexanone 10.5 8) Benz didehyde ( 2.0 ML) Density of phy CH = 1:044 97 pl Density = mass Densi19 Volume i mass= 1.044X2 = 2.088 9 1 mole of benzaldehyde (PACHO) = 106.122 & PACHO : 2.088 g PACHO = 2.088 x1 mole of PACHO 10 6-122 = 0.0196 mole of PACHO I mole of cyclohexanone = 98.143 g :. 0.5 g cyclohexanone = / 0.5x1) = 0.0050g mole 98.1437 CHO As p : i mole of Icetone deacts coith 2 role of audehyde 0.00509 mole of Ketone Deocis coith (0.00509x2) = 0.01018 more of adeny de But bede, 0.0196 mole odehyde is used . It means aldehyde is excess and cyclohexanone is a limiting geagent: