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    Microscale Organic Chemistry Lab Questions

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    1. Identify four moisture-protected reaction apparatus. I have identified 2 apparatus (Moisture-protected Claisen head with 3 or 5mL conical vial, arranged for syringe addition and magnetic stirring, and Moisture-protected water-jacketed condenser with 3 or 5mL conical vial, arranged for heating and magnet stirring). I may be making this harder than it should be and my question is: Does the Claisen head with 3 or 5mL conical vial constitute two apparatus, as well as the moisture-protected water-jacketed condenser with 3 or 5mL as two apparatus? If so, this would give me the four apparatus requested.

    2. What is the basis for distillation techniques used to separate two or more components? I may be way off base, but from what I understand, different distillation techniques are used when substances have different boiling points. Simple distillation techniques can be used where liquid is separated from a nonvolatile solute and the vapor phase consists of only one component. Am I correct in thinking that it needs to be fractional semimicroscale distillation with multiple theoretical plates for two or more components, or am I way off?

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    Solution Preview

    1. In question one you are missing one important thing. If this apparatus is for moisture-protected reaction there should be a guard tube. The guard tube should be at the receiver where you will obtain the distillate. And if you are planning a reaction just for refluxing there should be a guard tube at the upper end of the condenser. The guard tube is a simple apparatus which is filled with ...

    Solution Summary

    This solution provides explanations for various questions regarding a microscale organic chemistry lab.