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- Why does a solid form at the interface of the two solutions? PROCEDURESynthesis of NylonIn a small beaker dissolve ~ 0.5 mL of sebacoyl chloride in 12 mL of ether. In a smalltest tube get ~ 6 mL (~1/4 of a 6 “ test tube) of 1,6-diaminohexane solution in water.In order to form the good polymer fibers, it is best to not mix the solutions. Youshould try to layer one solution on top of the other. First pour the 1,6-diaminohexanesolution into a 100 mL beaker. Then slowly pour the sebacoyl chloride down the sideof the tilted beaker with minimal mixing. At this point you should see two distinctlayers with a white film at the interface. Hook the nylon which forms at the interfacewith a straightened paper clip and pull slowly straight up as high as possible. Thenwrap it around your large beaker and then continue to wind the polymer around tillthe reaction is complete. Rinse your polymer in DI water to remove any salts or acidthat may be present.Weigh your product and characterize it by…Calculate the volume of hydrogen at 0°C and 1.00 atmthat is required to convert 500.0 g linoleic acid (C18H32O2)to stearic acid (C18H36O2). (See Sec. 9.1.)Chlorhexidine gluconate is available in different products in concentrations of 4% w/vand 0.12% w/v. H ow many milliliters of the more dilute product may be prepared fromeach fluidounce of the more concentrated product?
- Prepare a 5 mM stock solution of Resveratrol (FW = 324.45). You have a 5 mg bottle and you want to use the whole bottle (all 5 mg).How do you prepare this solution? 10ml of 20% (w/v) L-arabinose stock (weight/volume). How much of L-arabinose and water do you need to prepare desired arabinose stockWhich polymer in Problem 26.34 is the most soluble in hexane? Justify your choice.
- You will make Nylon-6,10. What does the 6 and 10 refer to? PROCEDURESynthesis of NylonIn a small beaker dissolve ~ 0.5 mL of sebacoyl chloride in 12 mL of ether. In a smalltest tube get ~ 6 mL (~1/4 of a 6 “ test tube) of 1,6-diaminohexane solution in water.In order to form the good polymer fibers, it is best to not mix the solutions. Youshould try to layer one solution on top of the other. First pour the 1,6-diaminohexanesolution into a 100 mL beaker. Then slowly pour the sebacoyl chloride down the sideof the tilted beaker with minimal mixing. At this point you should see two distinctlayers with a white film at the interface. Hook the nylon which forms at the interfacewith a straightened paper clip and pull slowly straight up as high as possible. Thenwrap it around your large beaker and then continue to wind the polymer around tillthe reaction is complete. Rinse your polymer in DI water to remove any salts or acidthat may be present.Weigh your product and characterize it by…Considering the Rf’s of acetaminophen, aspirin, & caffeine, which compound has the most favorableinteractions with 1.)eluent 2.)silica gel?V 22
- Give the examples of emulsion prepare by these method:- 1)dry gum method 2)wet gum method 3)bottle gum method12.You needt o know the volume ofwaterinasmallswimmingpool,but,owingtothepool’sirregularshape, itisnotasimplemattertodetermineitsdimensionsandcalculatethevolume.Tosolvetheproblemyoustirin asolutionof adye(1.0gofmethyleneblue,C16H18ClN3S,in50.0mLofwater.After the dye has mixed with thewater,youtakeasampleofthewater.Usinganinstrumentsuchasaspectrophotometer,youdeterminethat theconcentrationofthedyeinthepoolis4.1x10 -8 M.Whatisthevolumeofwaterinthepool?Define Claison condensation ?
