Question

Macros III. Physical Properties 10 pts 10. Place the compounds below in order of increasing melting point. Briefly explain your reasoning VELHO d) e) f) f) 11. Place the same compounds in order of increasing polarity. Briefly explain your reasoning 12. Dichloromethane (methylene chloride CH2C12) is which of the following: i. Water immiscible and more dense than water il Water miscible and more dense than water ili. Water miscible and less dense than water iv. Water immiscible and less dense than water 13. Match the following compounds with their melting points: MeOH, N2, KO CHə(CH2) COOH i 210°C, 740°C, 69.3°C, -97.6°C, respectively 1 740°C, 69.3°C, -97.6°C, -210°C, respectively 69.3°C, -97.6°C, -210°C, 740°C, respectively iv.-97.6°C, -210°C, 740°C, 69.3°C, respectively V 740°C, 69,3°C, -976°C, -210°C, respectively 14. Which of the following liquids would be the most difficult to separate from water a) Propan-2-one b) Carbon tetrachloride c) cyclohexane d) diethyl ether e) methylene chloride

Answer 1

Am Melling port order - no ionic resonance makes it - stable Mo o onia I < T < ✓ < TCL < will b) (6) (0) (0) (f) yam-der (dipeli- cupole) (H-bonding) (Aalt) whal's will has highest melting point because it is an ionic compound with high ionic character. Compound (b) has ingher milling penit than ③ because its anion is stabilized by resonance , this is more stable. @ has higher melting bonit than f because @ is salt and ® is organic compound. 4 shows H-bonding which makes it to I met higher than (e) and © is having higher melling mit because it shows dipol-dipole interactions whereas lo shows van der Waal's interactions. Order: @ <@ < ① < ③ < ③ <@ .