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There is an alternative procedure that uses the weak base K2CO3 (pKa = 10.3) instead of NaOEt (pKa = 15.9); why can a weak base like K2CO3 be used for the phenacetin synthesis, given that Williamson ether syntheses using aliphatic alcohols need to use very powerful bases like sodium hydride or sodium metal (p. 537 of McMurry 8th ed.)?
Historically, the solid residue that is left after the Dichloromethane -or methylene chloride (CH2Cl2 )solution is evaporated has a lower melting point that its literature value, due to impurities.
A buffer is prepared by mixing 0.2 mole of HCOOH with 0.3 mole of NaHCOO in a volume of 200 ml. How many grams of NaOH must be added to achieve ph of 4
Find out the number of grams H2 formed when 250.0 mL of 0.743 M HCL solution reacts with 3.41 x 10^23 atoms of Fe according to the following reaction.
Define the following terms: carbohydrate, monosaccaride, disaccharide, polysaccaride. Give an example of a simple sugar and name the functional group associated with your example.
how many grams of dry nh4cl need to be added to 2.40 l of a 0.400 m solution of ammonia nh3 to prepare a buffer
A chemistry lab experiment requires 25.2 g of silver nitrate. How many grams of a 15.5% by mass solution of silver nitrate should be used
Explain the hazards associated with 1.0 moles of Ch3COOH solution, 0.10 moles of BaCL2 sloution, and 0.10 moles Na2C2O4 solution?
1-propanol p1 20.9 torr at 25 degc and 2-propanol p2 45.2 torr at 25 degc form ideal solutions in all proportions.
When 1 mol of Fe2O3(s) is formed by combustion of Fe(s)with O2(g), 824 kJ of heat is liberated. By this reaction, how many mol of Fe should be consumed in order to liberate 100. kcal of heat
when a solution of cuii chloride cucl2 is added to a solution of potassium sulfide k2s a black precipitate of copper
When compound A is treated with hot, basic permanganate solutoim followed by acide, three different molecules, B, C, D are produced. Compound B is identical to the product obtained by the side-chain oxidation of meta-xylene.
The standard state of carbon is solid graphite. Use the appropriate standard heats of formation given in Appendix II in the textbook to find the average bond energy of the C=O in CO2.
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