At -47°C the vapor pressure of ethyl bromide is 10 mmHg, while that of ethyl chloride is 40 mmHg. Assume that the mixture is ideal. If there is only a trace of liquid present and the mole fraction of ethyl chloride in the vapor is 0.80, a) What is the total pressure and the mole fraction of ethyl chloride in the liquid? b) If there are 5 mol of liquid and 3 mol of vapor present at the same pressure in a), what is the overall composition of the system?
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- 40.00 mL of 0.1100 M HCl is diluted to 100 mL with H2O and titrated with 0.1M NaOH. Calculate the pH after addition of the following volumes(mL) of titrant. d) 40.00 e) 43.95 f) 44.00 g) 44.05 h) 50.00. Plot the titration curve. Select an indicator from the table found in your book.An unknown mixture is known to contain only Ba(OH)2 (MW=171.34 g/mole) and NaOH (MW=40.0 g/mole). If the mixture is known to contain 45% by mass NaOH, and 8.0 grams of the mixture is dissolved completely in 50.0 ml of solution, answer the following. c).If 10.0 ml of a 0.2 M solution of Na2SO4 was added to the 50.0 ml solution, what would be the final concentration of Na+ in solution.A 35 mL of solution of hydrochloric acid is neutralized by 15 mL of 0.5 M potassium hydroxide. What is the concentration of hydrochloric acid? The balanced equation is HCI + KOH - H,O + KCI O 0.75 M O 0.25 M O 0.214 M O 0.786 M
- How many milliliters of 0.0050 N KOH are required to neutralize 25 mL of 0.0050 N H2SO4? To neutralize 25 mL of 0.0050 M H2SO4?A volumetric flask made of Pyrex glass is calibrated at 20 °C.It is filled to the 100 mL mark with 35 °C acetone. After the flask is filled the acetone cools and the flask warms so that the combination of acetone and flask reaches a uniform temperature of 32 °C. The combination is then cooled to 20 °C. a) What is the volume of the acetone when it is at 20 °C? b)At the temperature of 32 °C, does the level of acetone lie above or below the 100 mL mark?The following data was collected for n-pentane and isopentane: Compound P, (kPa) n-pentane 282.9 at 70°C 895.5 at 120°C Isopentane 955.9 at 115°C 1152.4 at 125°C а) Develop a correlation for the vapor pressure of Isopentane as a function of temperature. Clearly state the units. b) Calculate the vapor pressure of Isopentane at 120°C. c) Estimate the heat of vaporization of Isopentane by using the data in the table. A closed container contains a mixture of 65.0 mol% n-pentane and 35.0 mol% isopentane. The system is initially all liquid at 120.0°C and high pressure and the pressure is gradually reduced at a constant temperature. d) i. Calculate the pressure (in kPa) at which the first bubble of vapor forms. ii. What is the composition (in mole fractions) of the first bubble of vapor at the conditions found in part (i)? A new mixture contains cyclohexane (Pv=288.3kPa at 120°C), n-pentane and isopentane at 120°C and high pressure. The pressure is reduced at constant temperature to a point…
- The precipitation of three solid compounds: X, Y, Z, have the following equilibrium constants: Kx = 1.7 x 104 Ky = 0.6 x 108 Kz = 9.2 x 1012 Assuming a solution contains equal concentrations of ions to form these compounds, which among the three would have the least amount of precipitate at equilibrium? A) Not enough information в) х c) Y D) zQuinoline is isolated from a reaction mixture by the process of steam distillation. A mixture of quinoline and water distils at a total pressure of 740 mm Hg at 98.96°C. The vapour pressure of water (Po) is 732.04 mm Hg at this temperature. What is the maximum number of grams of quinoline which can be distilled with a 1000g of watervapour under a pressure of 740 mm Hg.The density of trifluoroacetic acid vapor was determined at 118.1 °C and 468.5 torr, and found to be 2.784 g/L. Calculate K, for the association of the acid. 0-H...O 2CF,CO,H(g) = CF;C CF,C(g) O----H-O
- 439 mL of 0.270 M hydrochloric acid is exactly neutralized with 0.920 M potassium hydroxide solution. What volume of base solution is required?The substance oxygen has the following properties: normal melting point: 54.8 K normal boiling point: 90.2 K triple point: 1.50×10-3 atm, 54.4 K critical point: 49.8 atm, 154.6 K A sample of oxygen is initially at a pressure of 58.9 atm and a temperature of 96.9 K. The pressure on the sample is reduced to 1.50×10-3 atm at a constant temperature of 96.9 K. Which of the following are true?Choose all that apply The sample is initially a liquid. The gas initially present will solidify. The final state of the substance is a gas. One or more phase changes will occur. The final state of the substance is a solid.Titration of a 12.0 mL solution of HCl requires 22.4 mL of 0.12 M NaOH. What is the molarity of the HCl solution?