Manny, Bong, and Rodrigo tried to do a recrystallization technique to purify a crude sample of benzoic acid. However, their instructor, Leni, pointed out some things about their technique. • Bong forgot to add charcoal to the crude sample. • Manny put the hot sample in the ice bath immediately. • Rodrigo used a long-stemmed funnel. Who among the students will achieve the highest purity? a. Bong Ob. None of the above O. Manny O d. Rodrigo

Manny, Bong, and Rodrigo tried to do a recrystallization technique to purify a crude sample of benzoic acid. However, their instructor, Leni, pointed out some things about their technique. • Bong forgot to add charcoal to the crude sample. • Manny put the hot sample in the ice bath immediately. • Rodrigo used a long-stemmed funnel. Who among the students will achieve the highest purity? a. Bong Ob. None of the above O. Manny O d. Rodrigo

EBK A SMALL SCALE APPROACH TO ORGANIC L

4th Edition

ISBN:9781305446021

Author:Lampman

Publisher:Lampman

Chapter80: Crystallization: Purification Of Solids

Section: Chapter Questions

Problem 4P

See similar textbooks

Similar questions

Start with 15mL of 0.100M HCl. Pipette 10mL of the 0.100M HCl into a 250mL beaker. Then dilute it to around 100mL with distilled water. What would the concentration of HCl be?
TRUE OR FALSE 1. Medicated elixirs are advantageous in adjusting the dose that may be increased or decreased by simply taking more or less of the elixir. 2. It is impossible to increase or decrease the amount taken of one ingredient without and automatic and corresponding adjustment in the dose taken of the other. 3. Then the alcoholic solution is added to the aqueous solution in order to maintain the highest possible alcoholic strength. 4. Saccharin is used for elixirs with low alcoholic content required only in small amounts. 5. Proportion of alcohol varies widely in elixirs since the individual components. 6. The final mixture of elixir will be clear since the separation of some of the flavoring oils by the reduced alcoholic concentration. 7. Permission of the oil globules oil to coalesce leads to difficulty in filtration. 8. Wetting the filter paper and collection flask using the solvent ensures continued solubility of the alcoholic ingredients. 9. Elixirs are best stored in…
10. Describe how you can decide whether your recrystallized trphenylmethanol is pure or not ?
Assume that your compound recrystallizes equally well from benzyl alcohol and isopropyl alcohol. Which solvent is the better choice for recrystallization? a. Benzyl alcohol because it is miscible with water. b. Isopropyl alcohol is better because it has a much lower boiling point and is easier evaporate off c. A mixed solvent - benzyl alcohol and isopropyl alcohol d. It doesn't matter which one if they work equally in the recrystallization process.
At the beginning of a fractional distillation, the temperature of the vapor at the top of the fractionating column will correspond with ___________. the approximate boiling point of the liquid in the vapor phase the approximate boiling point of the liquid in the round bottom flask the approximate boiling point of the mixture the liquid with the highest boiling point
In the results video, a 1% sucrose solution tested negative with Benedict’s solution (part B3). In a separate experiment, 3 M HCl was added to the 1% sucrose solution, allowed to react for 30 minutes, then neutralized with sodium bicarbonate. The resulting solution tested positive with Benedict’s solution. Solution Benedict’s Test 1% sucrose (from B3) - 1% sucrose + HCl (above) + Which solution (the solution from B3 or the one treated with HCl) tested positive for reducing sugars? What are the products of the acid-catalyzed hydrolysis?
Which of these is NOT true of a good recrystallization solvent? Which of these is NOT true of a good recrystallization solvent? a) The compound is insoluble in the solvent when it is cold. b) The solvent boiling temperature is at least 40 °C. c) The solvent has many impurities. d) The compound is soluble in the solvent when it is hot.
You are tasked with performing a recrystallization. You have 3 potential solvents to use, but you don't know which one will work. How will you go about deciding which solvent to use?
Chemistry Which lab technique(s) can be performed on solid, somewhat soluble samples? Melting Range Determination or Recrystallization. Melting Range Determination. Not Recrystallization. Neither Recrystallization nor Melting Range Determination. Recrystallization. Not Melting Range Determination.
Two students, Ryeo and Wookie, performed the solubility equilibrium experiment. In preparing the second trial at room temperature, Ryeo ran out of distilled water. He then used the stored distilled water from the refrigerator. On the other hand, Wookie was in a rush that he overtitrated his trial. What will happen to the results of their second trials? a. Both Ryeo and Wookie will obtain a higher calculated Kep. O b. Both Ryeo and Wookie will obtain a lower calculated Ksp. O c. Ryeo will obtain a higher calculated Ksp, but Wookie will still get an accurate value. O d. Ryeo will still get an accurate value, but Wookie will obtain a higher calculated Ksp.
What is brewing tea in water an example of? A. solid-liquid extraction B. liquid-liquid extraction C. none of the above D. recrystallization E. all of the above
If the solubility of a compound A in ether is 30g/100 ml, and the solubility of A in water is 15 g /100 ml. a) If 100 ml of aqueous solution of 3g of A are extracted twice with 100 ml ether. How much A total is extracted? b) How much A would be extracted if only one extraction, but with a volume of 200 ml of ether were extracted? c) What is your conclusion from the amount of A extracted in problems a and b above?