a)
Interpretation:Effect of unnecessarily large volume of solvent in recrystallization process should be determined.
Concept introduction:Recrystallization is technique that is used for purification of organic compounds. This process includes dissolution of solid in specific solvent at high temperature and then crystals are made again by process of cooling. Temperature of crystals is decreased to allow impurities to remain in solution only.
b)
Interpretation:No use of fresh cold solvent to wash crystals in recrystallization process should be explained.
Concept introduction:Recrystallization is technique that is used for purification of organic compounds. This process includes dissolution of solid in specific solvent at high temperature and then crystals are made again by process of cooling. Temperature of crystals is decreased to allow impurities to remain in solution only.
c)
Interpretation:Use of fresh hot solvent to wash crystals in recrystallization process should be explained.
Concept introduction:Recrystallization is technique that is used for purification of organic compounds. This process includes dissolution of solid in specific solvent at high temperature and then crystals are made again by process of cooling. Temperature of crystals is decreased to allow impurities to remain in solution only.
d)
Interpretation:Effect of use of large quantity of decolorizing carbon should be determined.
Concept introduction:Recrystallization is technique that is used for purification of organic compounds. This process includes dissolution of solid in specific solvent at high temperature and then crystals are made again by process of cooling. Temperature of crystals is decreased to allow impurities to remain in solution only.
e)
Interpretation: Effect of formation of crystals by solidified mass of oil separated from hot solution should be determined.
Concept introduction: Recrystallization is technique that is used for purification of organic compounds. This process includes dissolution of solid in specific solvent at high temperature and then crystals are made again by process of cooling. Temperature of crystals is decreased to allow impurities to remain in solution only.
f)
Interpretation: Effect of acceleration of crystallization by immediate placement of flask of hot solution in ice-water bath should be determined.
Concept introduction: Recrystallization is technique that is used for purification of organic compounds. This process includes dissolution of solid in specific solvent at high temperature and then crystals are made again by process of cooling. Temperature of crystals is decreased to allow impurities to remain in solution only.
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Chapter 3 Solutions
Experimental Organic Chemistry: A Miniscale & Microscale Approach (Cengage Learning Laboratory Series for Organic Chemistry)
- 3. You may want to read paragraph 1.5 in your textbook before answering this question. Give electron configuration (short-hand notation is fine) for: (5 points) 3+ a) Manganese atom and Mn³+ b) Se atom c) Cu atom and Cu+arrow_forwardPlease correct answer and don't use hand ratingarrow_forwardNonearrow_forward
- Nonearrow_forwardHowever, why are intermolecular forces in metallic and ionic compounds not discussed as extensively? Additionally, what specific types of intermolecular attractions exist in metals and ionic compoundsarrow_forwardWhat is the preparation of 1 Liter of 0.1M NH4Cl buffer at pH 9.0 with solid NH4Cl and 0.1M NaOH. How would I calculate the math to describe this preparation? How would I use Henderson-Hasselbach equation?arrow_forward
- C Predict the major products of this organic reaction. Be sure you use wedge and dash bonds when necessary, for example to distinguish between major products with different stereochemistry. : ☐ + x G C RCO₂H Click and drag to start drawing a structure.arrow_forwardFill in the blanks by selecting the appropriate term from below: For a process that is non-spontaneous and that favors products at equilibrium, we know that a) ΔrG∘ΔrG∘ _________, b) ΔunivSΔunivS _________, c) ΔsysSΔsysS _________, and d) ΔrH∘ΔrH∘ _________.arrow_forwardHighest occupied molecular orbital Lowest unoccupied molecular orbital Label all nodes and regions of highest and lowest electron density for both orbitals.arrow_forward
- Relative Intensity Part VI. consider the multi-step reaction below for compounds A, B, and C. These compounds were subjected to mass spectrometric analysis and the following spectra for A, B, and C was obtained. Draw the structure of B and C and match all three compounds to the correct spectra. Relative Intensity Relative Intensity 20 NaоH 0103 Br (B) H2504 → (c) (A) 100- MS-NU-0547 80 40 20 31 10 20 100- MS2016-05353CM 80 60 100 MS-NJ-09-3 80 60 40 20 45 J.L 80 S1 84 M+ absent राग 135 137 S2 62 164 166 11 S3 25 50 75 100 125 150 175 m/zarrow_forwardDon't used hand raiting and don't used Ai solutionarrow_forwardDon't used hand raitingarrow_forward
EBK A SMALL SCALE APPROACH TO ORGANIC LChemistryISBN:9781305446021Author:LampmanPublisher:CENGAGE LEARNING - CONSIGNMENT