PLEASE ANSWER ALL QUESTIONS FOR POINTS. THANKS IN ADVANCE!!!!!!! 5. What kinds o

Question

PLEASE ANSWER ALL QUESTIONS FOR POINTS. THANKS IN ADVANCE!!!!!!!

5. What kinds of forces are broken during evaporation of solvent? 6. Arrange next 5 substances in the order of increasing boiling point temperature (lowest boiling point - 1st) and explain the order (consult with Org. Chem. textbook, if necessary). Ethanol (CH3CH2OH) Dimethylether (CH3-O-CH3) Propanol (CH3CH2CH2OH) Ethane (CH3CH3) Propane (CH3CH2CH3) 7. Calculate the percent composition for 'Mixture A' given the following measurements (using formula on the last page of the prelab. 'Mixture A' is ethanol and phenol. A pure sample of the ethanol used to make 'Mixture A' had a corrected refractive index of nD20 = 1.3620; a pure sample of the phenol used to make 'Mixture A' had a corrected refractive index of nD20 = 1.5413. The corrected refractive index of 'Mixture A' was measured as nD20 = 1.4276.

Explanation / Answer

5) hydrogen bonds between neighboring water molecules are what is being broken.
6) Ethane, Propane, Dimethylether, Ethanol, propanol ( ranked in order of alkanes, ethers, alcohols and subranked by size)
7) let X = mole fraction of ethanol; (1-X = mole fraction of phenol)
X * 1.3620 + (1-X)*1.5413 = 1.4276
(1.3620-1.5413)*X = 1.4276-1.5413
-0.1798X = -0.1137
X = 0.632
ethanol moles = 63%
phenol moles = 27%

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.