Determine how many grams of each of the following solutes would be needed to make 3.60×102 mL of a 0.100 M solution.   (a) cesium iodide (CsI): (b) sulfuric acid (H2SO4) (c) sodium carbonate (Na2CO3) (d) potassium dichromate (K2Cr2O7)

29.2 Hydrogen sulfide (H₂S) is a common contaminant in natural gas. The dissolution of H₂S gas in water is a linear function of partial pressure, as is described by Henry's law of the form PA = H x. Values of H vs. temperature are provided below: T (°C) H (atm) mole H₂S/ mole MEA 20 483 PA (mm Hg) 30 449 Given the relatively low solubility of H₂S in water, an amine- based chelating agent is added to the water to improve the solubility of H₂S. Equilibrium distribution data for H₂S in a 15.9 wt% solution of monoethanolamine (MEA) in water at 40°C is provided below: 40 520 50 577 0.000 0.125 0.208 0.362 0.643 0.729 0.814 0.00 0.96 3.00 9.10 43.1 59.7 106 Describe the effect of temperature on the solubility of H₂S gas in water. b. Prepare equilibrium distribution plots, in mole-fraction coordinates (y₁ -— XÃ), for the solubility of H₂S in water vs. H₂S in 15.9 wt% MEA solution at 40°C and 1.0 atm total system pressure. Comment on the relative solubility of H₂S in water vs. MEA solution.

200. mL of a 6.0M solution of NaCl (solution A) is diluted to 2.00 Liters (solution B). Then 150. mL of solution B is diluted to 0.50 Liters. (solution C) What is the concentration of NaCl in solution C. Concentration in molarity=

Refer to the boiling point -composition curve and estimate the composition of the distillate of a mixture of benzene and toluene that is collected at 95 °C. Normal boiling point, °C 110 105 100 95 90 T Liquid 85 80 Toluene 0.200 0.400 0.600 0.800 Mole fraction of benzene (Xbenz.) 60% benzene 50% benzene 40% benzene 70% benzene Vapor 85 % benzene Benzene

Oxygen is diffusing in a mixture of oxygen-nitrogen at 1 std atm, 25°C. Concentration of oxygen at planes 2 mm apart are 10 and 20 volume % respectively. Nitrogen is non- diffusing. (a) Derive the appropriate expression to calculate the flux oxygen. Define units of each term clearly. (b) Calculate the flux of oxygen. Diffusivity of oxygen in nitrogen = 1.89 * 10 –5 m2/sec.

10.73 The normal melting point of benzene, C,H, is 5.5°C. For process of melting, what is the sign of each of the fol- lowing? (a) AH°, (b) AS°, (c) AG° at 5.5°C, (d) AG° at 0.0°C, (e) AG° at 25.0°C the

The diffusion coefficients for carbon in nickel are given at two temperatures: T(°C) D (m²/s) (a) Determine the value of Do. (b) Determine the value of Qd. kJ/mol 600 (c) What is the magnitude of D? at 870°C. 700 m²/s (Use scientific notation.) 5.5 x 10-14 3.9 × 10-13 m²/s (Use scientific notation.)

3. The microstructure of a Cu-Ag alloy at 779°C consists of primary a (with mass fraction of 0.73) and eutectic structure (with mass fraction of 0.27). Determine the composition of this alloy. Temperature (°C) 1200 A 1000 Ⓒ 800 600 400 200 a C (Cu) B 8.0 (CE) -Solidus Solvus 20 20 a +L Composition (at% Ag) 40 -Liquidus 779°C (T) a+B 40 60 Composition (wt% Ag) T Liquid 60 71.9 (C₂) 80 80 B+L 91.2 (Cpg) 100 T 2200 G TITINTI B ++ H 2000 1800 F 1600 1400 1200 1000 800 600 400 100 (Ag) Temperature (°F)