When 0.030 mol of HCl dissolves in 100.0 g of benzene, the solution freezes at 4
ID: 616987 • Letter: W
Question
When 0.030 mol of HCl dissolves in 100.0 g of benzene, the solution freezes at 4.04 oC. When 0.030 mol of HCl dissolves in 100.0 g of water, the solution freezes at -1.07 oC. Use data in the following table to calculate the expected molality of HCl in each solvent, ignoring the van't Hoff factor. Check the 3 statements which are correct
a.The calculated molality of HCl in benzene is less than 0.30 m. b.The calculated molality of HCl in benzene equals 0.30 m. c.The calculated molality of HCl in benzene is greater than 0.30 m. d.The results imply that HCl is moderately dissociated in BENZENE. e.The calculated molality of HCl in water equals 0.3 m. f.The calculated molality of HCl in water is between 0.3 m and 0.4 m. g.The calculated molality of HCl in water is between 0.5 m and 0.6 m. h.The calculated molality of HCl in water equals 0.60 m. i.The results imply that HCl is completely dissociated in WATER. j.The results imply that HCl is mostly dissociated in WATER. When 0.030 mol of HCl dissolves in 100.0 g of benzene, the solution freezes at 4.04 oC. When 0.030 mol of HCl dissolves in 100.0 g of water, the solution freezes at -1.07 oC. Use data in the following table to calculate the expected molality of HCl in each solvent, ignoring the van't Hoff factor. Check the 3 statements which are correct a.The calculated molality of HCl in benzene is less than 0.30 m. b.The calculated molality of HCl in benzene equals 0.30 m. c.The calculated molality of HCl in benzene is greater than 0.30 m. d.The results imply that HCl is moderately dissociated in BENZENE. e.The calculated molality of HCl in water equals 0.3 m. f.The calculated molality of HCl in water is between 0.3 m and 0.4 m. g.The calculated molality of HCl in water is between 0.5 m and 0.6 m. h.The calculated molality of HCl in water equals 0.60 m. i.The results imply that HCl is completely dissociated in WATER. j.The results imply that HCl is mostly dissociated in WATER.Explanation / Answer
delta T in benzene is 5.50 - 4.0 = 1.5 C molality is (0.03 mol / 0.1 kg) = 0.3 m 1.5 = (5.12)(0.3)(1) The van't Hoff factor is equal to 1 which means that HCl does NOT dissociate in benzene. delta T in water is 1.07 C molality is still 0.3 m 1.07 = (1.86)(0.3)(2) The van't Hoff factor is equal to 2 which means that HCl DOES dissociate in water. Correct answers are B, E, and I
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.