[CHM 11500] - Midterm Exam Guide - Ultimate 84 pages long Study Guide!

Study Guide to exam 11 . Problem II (20 points) An 32.3-mL volume of hydrochloric acid reacts completely with a solid sample of CaCOs. The reac IS: 2HCl(aq) + CaCO3(s) CO2(g) H2O(l) CaClz(aq) → + + The volume of CO2 formed is 171 mL at 25.0°C and 753 mmHg (a) What would be the volume if CO2 was collected at 27.0°C and 760 mmHg? (10 points.) (b) What is the molarity of the HCl solution? (10 points.)

CHE 112 MIDTERM EXAM PRACTICE QUESTIONS 4. The characteristically pungent odor of'skunk spray' is due to the presence of sulfur containing compounds called mercaptans. At 28.0°C, the vapor pressure ofone of these compounds, n. mercaptan, is 175 torr. The molar mass of the mercaptan is 75.16 g/mol and it's density is 0.84 g/mL. prop What is the vapor pressure, at 28.0 ℃, of a solution made by mixing 100.0 mL of n-pro mercaptan with 0.250 mol of a nonvolatile nonelectrolyte solute? (6 pts) a. b. What is the vapor pressure, at 28.0 °C, of a solution made by mixing 100.0 mL of n-prop mercaptan and 100.0 g CH,CN P-102 torr), if Raoult's Law is obeyed? (6 pts) Which solution of mercaptan above will snell more strongly of the skunk odor, the solution e.