Question

please solve and explain

30. An aqueous solution of 0.35 MCHECH NHF(BTO) has a pH of A. 2.91 B. 6.82 c. 7.18 D. 11.09 E. 13.54 31. What is the pOH of a solution of a 1.4 x 10-3 M Sr(OH)2 aqueous solution? A. 2.55 B. 2.85 C. 3.15 D. 11.15 E. 11.45 32. A 1.10 g sample contains only glucose (C6H1206) and sucrose (C12H2011). When the sample is dissolved in water to a total solution volume of 25.0 mL, the osmotic pressure of the solution is 3.78 atm at 298 K. What is the mass % composition of sucrose in the solution? Molar Mass C6H12O6 = 180.16 g/mol Molar Mass C2H22011 = 342.30 g/mol A. 13% B. 15% c. 20% D. 62% E 78%

Answer 1

30. CHACH, Nida Bro) is a salt of strong base and wear cuid pro Brno Pkast HoBr = 8.65 xe ... PH of 0.35M CH₂ CH₂ No 3 (Bro) are PH = b Pkw + 2 pra + 2 loge, da so = 2 x 14 + 2 x 8.65 + 2 x 0.35 = 17 + 4:325+ 0.175 - 11.5

31. SCOH), Sv 2+ + 204 1.4 x16 px 1.4 xo Гон) 2 x, xo 3 - 2.8 x103 рон - Сен 1- (.8 16 ) polt = 2.55