Why did we have to rinse the flask with ethanol and why did it have to be cold ethanol
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Why did we have to rinse the flask with ethanol and why did it have to...
Why did we have to use hot ethanol for the recrystallization
a) Which products (shown above) from reaction 3 can react with
HCl in an acid-base reaction? Show the mechanism for this acid-base
reaction and give the structures that would result from the
protonation of these products. Which phase (organic or aqueous)
would these protonated products be soluble in?
b) Which phase (organic or aqueous) would the
p-methylacetanilide be found in?
c) Why did we have to use hot ethanol for the
recrystallization?
d) Why did we have to cool the...
13. In step 5 of reaction 3, the reaction mixture containing the products shown below in ethyl acetate is extracted twice with HCI. NH2 NH2 HN o-methylaniline m-methylaniline p-methylacetanilide a) Which products (shown above) from reaction 3 can react with HCl in an acid-base reaction? Show the mechanism for this acid-base reaction and give the structures that would result from the protonation of these products. Which phase (organic or aqueous) would these protonated products be soluble in? (6 points) b)...
A flask was filled with 150.00 mL of ethanol. By weighing the flask before and after adding the ethanol, it was determined that the flask contained 118.40 g of ethanol. In a second experiment, 20.5362 g of metal beads were added to the flask, and the flask was again filled to the 150.00 mL mark with ethanol. The total mass of the metal plus alcohol in the flask was determined to be 141.67 g. What is the density of the...
Why is ice-cold water needed to rinse the aspirin product? What will happen if warm water was used?
Why is it necessary to rinse the pipets with the solution to be used in them before using the pipets? Why is it necessary to rinse out the cuvette with the solution to be used in it before making our measurements? Why must we use the same cuvette for ail measurements? What is the purpose of "zeroing" the spectrophotometer using a "blank" solution (water)? What assumptions are we making in the calculations and analysis for this lab? 6.019 g of...
a. Where did the R constant in PV = nRT come from, and why must we convert everything to the units of the R constant? b. If a sample of ethanol (C2H6O) was determined to have a pressure of 2 atm at a temperature of 25 C (celsius), what is its density (in g/L)?
A 250 mL flask contains air at 1.061 atm and 20.3 °C. 5 mL of ethanol is added, the flask is immediately sealed and then warmed to 93.3 °C, during which time a small amount of the ethanol vaporizes. The final pressure in the flask (stabilized at 93.3 °C) is 2.833 atm. (Assume that the head space volume of gas in the flask remains constant.) a. What is the partial pressure of air, in the flask at 93.3 °C? 1homework...
What could I have done wrong in the saponification of the ester? I did not get soap 1.) Place .18 g of saturated triglyceride in a 5 mL short necked round bottom flask. 2.)Add 1.5 mL of a 50-50 water ethanol solution that contains .18 g of sodium hydroxide. 3.)Add an air condenser and gently reflux mixture on sand bath for 30 minutes Do not boil away ethanol -At the end of their reaction period, some of this soap will...
explain why it is important to rinse the buret with KMnO4 solution twice before titration? And why you should rinse buret with water thoroughly before you leave?