Interpretation:
The reason for propanamide having higher boiling point comparing to methyl acetate even though both are soluble in water has to be determined.
Concept Introduction:
Hydrogen bonding is a type of dipole-dipole interaction of molecules when the hydrogen is bonded to strong electronegative atom in the molecules.
The boiling points of aliphatic
The
Increasing order of boiling point of some organic compounds with similar molecular weight can be represented as follows,
Want to see the full answer?
Check out a sample textbook solutionChapter 17 Solutions
Fundamentals of General, Organic, and Biological Chemistry (8th Edition)
- What mass of sodium glycolate (NaC2H3O3) should be added to 400.0 mL of 1.00 M glycolic acid to produce a buffer solution with a pH of 4.00? Ka = 1.47 x 10-4. Please indicate the full solutions.arrow_forwardTo prepare 1.00 L of a 50.0 mM NEM (N-ethyl morpholine, pKa of its conjugate acid is 7.67) buffer at pH 6.8, the amount of N-ethylmorpholine (density = 0.916 g/mL, MW = 115.17 g/mol ) needed is ______g or ______mL. Since NEM is the weak base, HCl is needed to adjust the pH to the final pH of 6.8. For this purpose, the estimated amount of a 10 M HCl needed is ______mL.arrow_forwardMD ordered morphine SO4 gr 2/5 and the pharmacist has a stock solution of gr 1/8 per milliliter of morphine SO4. How many milliliters of the stock solution is required to fill the Rx?arrow_forward
- Glycine hydrochloride (Cl− H3N+CH2COOH) is a diprotic acid that contains a carboxylic acid group and an ammonium group and is therefore called an amino acid. It is often used in biochemical buffers. Solve, In analogy with Figure , sketch the titration curve of this diprotic acid.arrow_forwardDetermine the weight/volume of the chemicals needed to prepare the following solutions: a) 100 ml of 0.9% (w/v) saline (NaCl) b) 30 ml of 50% glycerol (v/v) c) Electrophoresis requires TAE, which is a specific mixture of Tris base, acetic acid, and EDTA. TAE is normally made as a 50X concentrated stock. Provide a recipe to make 40 ml of 50X TAE. The recipe for one liter of 50X TAE is as follows: 242g Tris base, 57.1 ml glacial acetic acid, 100 ml 0.5 M EDTAarrow_forwardThe standard enthalpy of formation of ammonia at 25°C is -46.3 kJ/mol. Estimate the N-H bond enthalpy at this temperature. (Given: BE(NN) - 941.4 kJ/mol, BE(H-H) 436.4 kJ/mol) 360 kJ/mol × O 383 kJ/mol O391 kJ/mol O459 kJ/mol O475 kJ/mol Your answer is incorrect. Garrow_forward
- Draw dipeptide Arg-Thr at pH 6.0. Circle the six atoms that are restricted in one plane. Calculate its approximate pI assuming pKa for NH3+ is 10.0, pKa for COOH is 3.0, PKR for Arg is 12.0arrow_forwardTirofiban (C22H36N₂O5S MWt = 440.6) is present as tirofiban HCI monohydrate (C22H36N2O5S.HCI.H₂O MWt=495.1) at 0.281 mg/mL in a concentrated solution. A solution for infusion is prepared by extracting 50 mL from a 250 mL bag of 5% glucose solution and adding 50 mL of concentrated solution. Sofia who weighs weighs 87 kg requires a tirofiban dose of 0.1 mcg/kg/min for 12 to 24 hours. What would the infusion rate be (mL/h)? (Answer to 1 decimal place.) Answer:arrow_forwardThe enzyme urease is widely used for determining urea concentration in blood. The Michaelis constant for urease at room temperature is 2.0 mM and k2 = 2.8 × 104 s-1 at pH = 7.5. Based on the kinetic experiment, when 0.34 mM urease was used, the initial rate of the reaction was determined to be 3.49 M/sec. What is the concentration of urea in blood in unit of mM? Please keep your answer to two decimal place. Please convert all concentration unit to mM in calculation.arrow_forward
- A decapeptide has the following acid composition; Al2,Arg,Cys,Glu,Leu,Phe,Val Partial hydrolysis yield the following tripeptides; Cys-Glu-Leu+Gly-Arg-Cys+Leu-Ala-Ala+Lys-Val-Phe-Gly Reaction of the decapeptide with 2,4-dinitrofluorobenzene yields 2,4-dinitrophenylysine. From the experimental data, deduce the primary structure of the decapeptide. Suggest a scheme you will follow to synthesize the dipeptide Ala-Gly.arrow_forwardThe main constituents in vinegar are water and ethanoic acid (CH3COOH). In order to determine the concentration of acid in homemade vinegar, a student titrated 25 cm3 of 001 M NaOH against the vinegar. The equation for the reaction is: CH3COOH(aq) + NaOH(aq) ® CH3COONa(aq) + H2O(l) The following titration results were obtained: Burette readings (cm3) Rough 1 2 Final burette reading 20.10 38.90 31.40 Initial burette reading 0.10 20.00 12.50 Volume of vinegar used 20.00 18.90 18.90 (a) What volume of vinegar should be used in the calculation? (b) What is the mole ratio of NaOH:CH3COOH? (c) Calculate the number of moles of alkali in 25 cm3 of NaOH solution used. (d) How many moles of acid were used in the titration? (e) Calculate the…arrow_forwardDetermine the fluoride ion concentration for a saturated solution of magnesium fluoride. K sp = 7.4 x 10-11arrow_forward