1.) What is the ideal solvent volume for heating under reflux?
Reflux procedure and report 1) You start at the same time and in same devices reflux of 40 ml of hexane and in another one 40 ml of benzene. Which device will start reflux first? Explain 2) Why reflux is a referable method of running chemical reactions that require heating? Why not just heat your reaction content in the Erlenmeyer flask? 3) Why do we turn heat off first and water only after your device is at room temperature? 4)...
1.In chemistry, what does the term “reflux” mean when heating a liquid? How is that different from boiling? 2.When the condenser is set up, why is the coolant water set to flow gently through the tubing instead of at a hard, rapid flow? 3.When heating, why do you wait to start your timer for the reaction until it has started to reflux? 4.Why is the filtration set-up rinsed with hexane before use?
What is reflux and why are reactions mixtures heated under reflux?
This solid compound can be hydrolyzed in aq NaOH ( heating under reflux ) Above compound was reacted with NaOH and then mixture was cooled. After cooling HCl was added and precipitates were seen. a) draw the structure of precipitate and species containg benzene ring before the addition of HCl b) show the mechanism of how the species containing benzene ring before the addition of HCl was formed 0 ОН
what are the properties of an ideal recrystallization solvent?
Assuming that your heat setting is fine, if during the reflux all of your solvent as evaporated out of your flask, what may be the cause? Explain.
Propose an electron-pushing mechanism for the following transformation. Hınt: use reflux (heating) to carry out hemolytic cleavage of NBS first. (10 points) Br NBS, CCI4 BaCO3, reflux но но но OMe но ÓMe NBS: BaCO3 Lewis base N-Br Propose an electron-pushing mechanism for the following transformation. Hınt: use reflux (heating) to carry out hemolytic cleavage of NBS first. (10 points) Br NBS, CCI4 BaCO3, reflux но но но OMe но ÓMe NBS: BaCO3 Lewis base N-Br
What is the ideal solvent for Phenanthrene if you're trying to isolate and crystallize it?
e what happens under varying conditions. An ideal gas occupies a volume of 1.0 cm' and is at 20.0°C and atmospheric pressure. a. Determine the number of molecules contained in the gas. b. If the pressure is reduced to 10" Pa (a very good vacuum) while the volume and temperature remain constant, how many moles of gas remain in the container? c. Calculate the average speed of the nitrogen molecules in the gas.
26.- Find the heat associated to the constant volume heating of 1 mol of CH, considered ideal, from 25°C to 50°C. (A) 904.80 J (B) 417.42 J (C) 623.59 J (D) 519.66 J (E) 200.55 J