Note: Respond to all questions from part A to B. Thank you
A. Write a description of explanatory of this lab(write in details as much as you can)
B. Why you are doing this experiment and What you will learn in the process
DIRECTIONS our instructor may suggest additional tests to carry out on your hydrocarbon Your unknown hydrocarbon is flammable; keep it away from flames and hot surfaces. Purification and Boiling-Point Determination. Obtain a sample of the unknown hydrocarbon from your instructor number and the ambient barometric pressure in your laboratory notebook. Select a suitable heat source and assemble an apparatus for simple distillation [OP-30] using a boiling chip or a stirring device. Be sure that the thermometer bulb is positioned correctly in the Hickman still. Distill the liquid slowly, setting aside a low-boiling forerun or high- boiling fraction (if any) for later disposal. Record its boiling range and the temperature when about half of it has distilled (the median boiling point) (see OP-34a). Then carry out a boiling-point measurement [OP-34b] on the hydrocarbon using a capillary-tube method. The resulting boiling point should be within 1-20 of the median distillation boiling point. If it is not, repeat the boiling point measurement or redistill the hydrocarbon. . Record its identification ction to the boiling point if the atmospheric pressure was below 750 torr. Density Measurement. The temperature of the purified hydrocarbon should be close to 20°C. Accurately measure [OP-5] 0 into a clean, dry, tared vial using a measuring pipet or an auto Stopper the vial immediately and weigh [OP-4] it to the nearest milligram on an matic pipet. accurate balance. Calculate the density of your hydrocarbon from