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- Give a brief introduction on the following topic i.e. (solids: recrystallization and melting points experiment) Should be a page long1. How does steam facilitate the distillation of essential oils? 2. Discuss some applications of simple distillation and steam distillation. Explain why you can use each method for the chosen application Please explain and do not copy from googleShow in a detailed manner. 1. Draw and label the set-up for melting point determination using capillary tube. 2. Differentiate melting point and melting point range.
- Why acetone has les retention time and toluene has more. discus about polarity of 3 samples and interaction with stationary phaseDistillation is best done at what speed? a) Very fast to avoid loss of material b) The rate of distillation isn't all that important c) Very slow to get the best separation d) At a moderate speed, but no faster than a degree of equilibrium can be maintainedVolumetric pipettes are designed to deliver a precise amount of liquid, but only if you a. submerge the end of the pipette into a solution you are delivering. b. allow the pipette to drain freely, and leave any residual solution in the pipette. c. hold the pipette at a 45 degree angle and ensure that all the liquid is delivered.
- True or False. It is very important to regulate the temperature of the heating mantle so that the distillation occurs at a rate of about 1 drop per 2 seconds. Explain why?sketch a schematic showing how a liquid sample can be extracted from a liquid pipeline?What specimens and procedures require a chain of custody form? Put in a table with corresponding explanation.