A P A P CH 2 Cl 2 0 67133 torr 89 torr P CH 2 Br 2 0 3311 torr 3 6 torr Add the

# A p a p ch 2 cl 2 0 67133 torr 89 torr p ch 2 br 2 0

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AP0APCH2Cl2= (0.67)(133 torr) = 89 torrPCH2Br2= (0.33)(11 torr) = 3.6 torrAdd the two together to get the total vaporpressure (Dalton’s Law).Ptotal=PA+PB+· · ·= 89 torr + 3.6 torr = 93 torrYou might want to check to see that youget the same answer no matter what valueyou assume as the equal masses of the twocomponents. As an additional challenge, canyou solve this problem WITHOUT assuminga definite number of grams, by setting themass of each component equal to an algebraicvariable?01510.0 pointsFindthenormalboilingpointof4.9m
lakhani (ral963) – Homework 2 – Sutcliffe – (52440) 5 CaCl 2 (aq), assuming it undergoes complete dissociation. The boiling point constant of water is 0 . 51 K · kg / mol. Your answer must be within ± 0.3% Correct answer: 107 . 497 C. 017 10.0 points Polyacrylamide is a water-soluble polymerwhose aqueous solution containing 25 g/L de-velops an osmotic pressure of 0.54 torr at25C. Find the approximate molecular weightof the polymer sample. What answer gives the expected order ofincreasing osmotic pressure?
lakhani (ral963) – Homework 2 – Sutcliffe – (52440) 6 3. lowest Z3 < Z2 < Z1 highest correct 4. lowest Z1 < Z2 < Z3 highest 5. lowest Z2 < Z3 < Z1 highest Explanation: The osmotic pressure of a liquid increases as the number of moles of solute particles or ions increases. 0.5 mol/L Na 2 SO 4 means 0.5 mol of SO 4 ions and 1 mol of Na ions for a total of 1.5 ions. 0.6 mol/L NaCl means 0.6 mol of each Na and Cl ions for a total of 1.2 mol of ions. 1.0 mol/L of sugar means 1 mol of sugar molecules. Therefore, since Na 2 SO 4 has the highest concentration of particles or ions, it will have the highest osmotic pressure.