determine the theoretical yield and percent yield Place 4 mL of 10% sodium hydro
ID: 944046 • Letter: D
Question
determine the theoretical yield and percent yield Place 4 mL of 10% sodium hydroxide into a 5-mL vial containing a spin vane. 2. Place the 4-nitroacetanilide from the second reaction into reaction vial and seal veal tightly. 3. Place 5-mL vial with reactants in a 105-110degreeC, pre-heated heat block. 4. Heat reaction vial for 45 minutes with moderate stirring. 5. After the 45-minute reaction period, remove reaction vial from heat block and allow vial to air cool in hood to ambient temperature before opening. Isolation and Purification of Product 1. After 5-mL vial has cooled to ambient temperature, place reaction vial into an ice-salt water bath for 10 minutes. 2. Filter solids in reaction vial using vacuum filtration and a Hirsch funnel. 3. Rinse reaction vial with filtrate and pour over solids in funnel with vacuum filtration. 4. Wash solids in Hirsch funnel with 3-mL of cold water Repeat washing. 5. Pull air across solids for 3 minutes. 6. Recrystallize your product using reagent alcohol and water. (See page 4) 7. Use a 25-mL Erlenmeyer flask and 3-mL of 50/50 reagent alcohol and water to start recrystallization process. 8. After recrystallized product has started to form, add 2 mL of water to increase recovery of product.Explanation / Answer
Theoretical yield = (Number of moles of p-Nitroacetanilide used) x 138.1
(138.1 = moelcular mass of p-Nitroaniline)
You have not mentioned, how many grams of p-Nitroacetanilide were taken.
Converting number of moles of p-Nitroacetanilide = (mass of of p-Nitroacetanilide)/ molecular mass of p-Nitroacetanilide)
Percent yield = (Product obtained / Theoritical yield) x 100.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.