Chm 205 - Study guides, Class notes & Summaries

CHM 205 Final Exam 2024...

CHM 205 Lab Final Exam 2024...

Why would you use a filtering pipet? Used to remove unwanted solid from a liquid -When you want the liquid Why would you use a filter-tip pipet? -to remove solids from very small amounts of liquid by leaving solid behind (as opposed to trapping it) -when you want the solid Why (in exp. 0) do you rinse w/ 1 mL of methanol and 1 mL of hexane? -methanol dissolves and hhexane has a low bp to evaporate liquid What m.p. indicates purity? -a narrow melting point range -an im...

Exp 0: Define melting point range Span of temperature from the point at which the crystals first begin to liquefy to the point at which the entire sample is liquid. Exp 0: What is the proper heating rate used to determine a compound's melting point range? What would happen if you exceeded this heating range? Proper heating rate: 2 degrees C per minute Exceeding this heating rate would introduce errors, such as premature liquefaction or putrefaction of the compound. liquefactio...

Lab report for experiment 5a including pre and post lab

Lab report for experiment 4 including pre and post lab

Lab report for experiment 5b including pre and post lab

Questions and correct answer for three organic chemistry exams

Lab report for experiment 2 including pre and post lab

What is the purpose of using a fluted cone? Creates higher surface area, allowing for faster filtration Which is the most efficient technique to remove solids from microscale solutions? use a filter pipette with a small piece of cotton and filter the solution into a craig tube. 00:42 00:54 What is the correct way to hold a pipette and why? Vertical, the liquid must not touch the sides and this prevents a change in the sample volume from occurring. Types of melting poi...