the reagents appropriately from the following amounts. Add 1.5 mL of methanol to

Question

the reagents appropriately from the following amounts. Add 1.5 mL of methanol to the cam. phor contained in a.50-mL flask. Stir with a glass stirring rod until the camphor has dis- solved. In portions, cautiously and intermittently add 0.25 g of sodium borohydride to the solution with a spatula. When all of the borohydride is added, boil the contents of the flask on a warm hot plate (ow setting) for 2 minutes Isolation and Analysis of Product. Allow the reaction mixture to cool for several minutes and carefully add 10 mL of ice water. Collect the white solid by filitering it on a Hirsch funne and, by using suction, allow the solid to dry for a few minutes. Transfer the solid to a dry Erlenmeyer flask. Add about 10 mL of methylene chloride to dissolve the product. Once the product has dissolved (add more solvent, if necessary), add about 0.5 g of granular anhy drous sodium sulfate to dry the solution. When dry, the solution should not be cloudy If the solution is still cloudy, add some more granular anhydrous sodium sulfate. Transfer the solu- tion from the drying agent into a preweighed dry flask. Evaporate the solvent in a hood, as described previously

Explanation / Answer

Here the main reactants are camphor and sodium borohydride.

Methanol, water and methylene chloride are the solvents used in the reaction. So the amount of product formed will be independent of the amount of these solvents. Also granular anhydrous sodium sulfate is acting as adrying agent. It is not involved in the reaction.

We know , limiting reagent is a substance that is fully consumed when the chemical reaction is complete. The amount of product formed is limited by this reagent. So, here sodium borohydride (0.007 moles) is the limiting reagent.

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.