Question

24. Circle one word inside each set of parentheses in the following statement: (Solutions, colloids, suspensions) contain the smallest particle size and (solutions, colloids, suspensions) contain the largest particle size. Which statement about colligative properties is incorrect? A. Solutes will lower the freezing point and raise the boiling point of a solvent. B. Colligative properties depend only on the number of dissolved particles and not on their size or chemical properties. C. Colligative properties involve only charged particles in solution. D. Freezing point depression and boiling point elevation are colligative properties. _Which of the following solutions will have the highest boiling point? A. 3.2 M K3PO4 B. 3.2 M Cu(NO3)2 C. 3.2 M ethanol D. 3.2 M NaCl _Which of the following solutions will have the lowest freezing point? A. 2.0 M K3PO4 B. 2.0 M Cu(NO3)2 C. 2.0 M ethanol D. 2.0 M NaCl 28. If the following pairs of solutions are separated by a semi-permeable membrane, indicate with an arrow the direction of the water flow, or if there would be no flow. 1.0 M Ca(NO3)2 and 1.0 M NaCl 1.0 M Na2SO4 and 1.0 M KBr 1.0 M glucose and 1.0 M NaOH 1.0 M glucose and 1.0 M alcohol

Answer 1

Date - Caathi 40-24 solutions have particle size = 0.1 nm to 1 non. colloids = 1 nim to 1000nm дирі та 2 1000 пм dolutions have smallest particle size. duspensions have largest partiell size s 25 A) It is true as addition of solute in peve solvent, lowers its freezing point anel elevates its bailing points D is also correct as, freizeing point depression & Bolling polut events au colligative properties (because they depend on concentration of solute molecule orions but not upon the identity of salute) B) is correct because colligative properties take into account the number or concumbation of dissolved partiell bet identity or nature c) is incorect as walligatiul properties inuolue all solute partilo whether ion or not. 26 AT, = i x m. ko (elevation is bp) is no opastiles formed when compoul. dissolves :0 Tha i ( when conch is seeme iz for ka poy = 4 (3+1) for Cu(NO3) = 1+2=3 for Ethanol a 1 (covalent compound) for Nach = 2. As Kz Pou has greatest i i atb is largest for K₃ Ply 2) Bip of 3.2M K 3 Pou will be highest

solvent Caathi) Date 267 Aty z ix mx kq. (f.p of solution s fpoppure otsa fp oppure solvent - Sp of solution. Atgai • K₂PO4 is highest- dpression in tpolks Pou is more Laust freezing point will be of 2 - 0 MK₂PO4 . Ons 28 flow of solvent during osmosis is always from higher pressure region. 4. Хрил рядки - T =; MRT i vaut hoff factor Cosmotic pressun ma comer . when M is same for two solusions лв 1. 0 IM Ca (NO3)2 lm Nach iz 3 (1+2) i (1+1)=2 . - Krom Anael. mater fromes from CaNO3)₂ Nac. ☺ in a yoq=3 (211) ixhr = 1+1 = 2 T, 50, 75 х water flows from Nasou e kBr (3) 14 см 1-1 weater 1HNaOH E 1+1 = 2 flows from NaOH to glucose 4 2M glucose & 1M shohol As both are covalent compound, so i= 1 There will be no flow of water as osmotic pressure is balance Cath the sides.