300 g of baking soda (solid) and 8 kg of vinegar (liquid) mixture react to form 192 g of sodium acetate along with water and carbon dioxide gas: NaHCO3 + HC2H302 - NaC2H302 + H20 + CO2 If the desired product is sodium acetate (NaC2H302). Calculate the a. molality of baking soda, b. mole percentage of baking soda, c. percentage yield of desired product

Titanium dioxide (TIO:) is used extensively as a white pigment. It is produced from an ore that con- tains ilmenite (FETIO,) and ferric oxide (Fe,0,). The ore is digested with an aqueous suifuric acid solution to produce an aqueous solution of titanyl sulfate [(TiO)SO.] and ferrous sulfate (FeSO,). Water is added to hydrolyze the titanyl sulfate to H;TIO3, which precipitates, and H2SO.. The pre- cipitate is then roasted, driving off water and leaving a residue of pure titanium dioxide. (Several steps to remove iron from the intermediate solutions as iron sulfate have been omitted from this description.) Suppose an ore containing 24.3% Ti by mass is digested with an 80% H;SO, solution, supplied 50% excess of the amount needed to convert all the ilmenite to titanyl sulfate and all the ferric oxide to ferric sulfate [Fe;(SO,)). Further suppose that 89% of the ilmenite actually decomposes. Calculate the masses (kg) of ore and 80% sulfuric acid solution that must be fed to produce 1000 kg…

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.

A continuous fractionating column is required to separate a binary mixture containing 0.20 mole fraction of A into a top product of 0.95 mole fraction A, and a bottom product containing 0.02 mole fraction A. The feed is liquid at its boiling point. The vapour leaving the column is condensed but not cooled, and the reflux ratio is 9:1. The relative volatility (a) remains constant at 1.85 and the vapour and liquid equilibrium data are in the form: α = y(1-x) x(1-y) Calculate: (a) the number of theoretical plates required; (b) the position of the feed plate;

16. Every year, oral rehydration therapy (ORT) –the feeding of an electrolyte solution -saves the lives of countless children worldwide who become severely dehydrated as a result of diarrhea. One requirement of the solution used is that it be isotonic with human blood. An ORT solution contains 3.5 g NaCl, 1.5 g KCI, 2.9 g Na3C6H507 (sodium citrate), and 20.0 g C6H1206 (glucose) per liter. What is the freezing point of this solution? You may assume that the density of the solution is 1.00 g/mL and that the freezing point depression constant (Kf) for water is 1.86 °C/m. -0.59 оС -1.86 оС 0.00 oC +0.51 oC -7.44 oC