The value of Kp (@ 25 °C) for compound H when partitioned between water and chloroform is 2.1. Starting with a solution of 30 g of compound H in 250 mL of water what quantity of compound H (in grams) would remain in the water layer after two successive extractions with chloroform each using 125 mL of chloroform? Please carry maximum number of significant figures through to final answer then round to one decimal place. Please do not include units.
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- You are given a substance that is qually soluble in water and hexane (two immisible solvents) a) what is Kd B) if you start with 10g of the substance dissolved in 100ml of water and are given 100ml of hexane to extract with, algebriaically show that it is better to do two smaller extractions using 50 ml of hexane for each extraction than it is to do one extraction using 100ml of hexane50.0 mL of 1.0 M HCl (at 22.0ºC) and 50.0 mL of 1.5 M NaOH (at 22.0ºC) are mixed. The solution temperature rises to 28.9ºC. What is ΔHrxn for the reaction?A 1.00-m solution of acetic acid, CH3COOH, in benzene has a freezing point of 2.96°C. Use the data in the Table to calculate the value of i and suggest an explanation for the unusual result. (Hint: If i is less than 1.0, each formula unit that dissolves yields less than one solute particle, an outcome suggesting aggregation of solute particles.) Answer is: i = 0.50; formation of dimers of composition (CH3COOH)2, need steps shown to understand though
- The solubility of silver bromate, AgBrO3, in water is (7.70x10^0)x10-3 g/L. What is the Ksp for this salt? Express your answer to three significant figures. Note: Your answer is assumed to be reduced to the highest power possible.The following evidence was obtained from an experiment to determine the solubility of calcium chloride at room temperature. A sample of saturated calcium chloride solution was evaporated to dryness, and the mass of solid residue was measured.EvidenceVolume of solution (mL) = 15.0Mass of empty beaker (g) = 90.54Mass of beaker and residue (g) = 101.36The solubility of calcium chloride is g/100 mLA solution is prepared by dissolving 40.00 g of NaCl (f.w. = 58.44 g mol–1), a non-volatile solute, in enough water (m.w. = 18.02 g mol–1) to result in exactly 1 L of solution at 25 °C. Assume the density of the solution is that of pure water (dsolution = 1.000 g mL–1). The ebullioscopic constant (Kb) for water is 0.513 °C m–1. The cryoscopic constant (Kf) for water is 1.86 °C m–1. The vapor pressure of pure water is 0.0313 atm. Find the freezing point of the solution(in C to 2 decimal places)
- A solution is prepared by dissolving 40.00 g of NaCl (f.w. = 58.44 g mol–1), a non-volatile solute, in enough water (m.w. = 18.02 g mol–1) to result in exactly 1 L of solution at 25 °C. Assume the density of the solution is that of pure water (dsolution = 1.000 g mL–1). The ebullioscopic constant (Kb) for water is 0.513 °C m–1. The cryoscopic constant (Kf) for water is 1.86 °C m–1. The vapor pressure of pure water is 0.0313 atm. Find the osmotic pressure in atm to three decimal placesA solution is prepared by dissolving 40.00 g of NaCl (f.w. = 58.44 g mol–1), a non-volatile solute, in enough water (m.w. = 18.02 g mol–1) to result in exactly 1 L of solution at 25 °C. Assume the density of the solution is that of pure water (dsolution = 1.000 g mL–1). The ebullioscopic constant (Kb) for water is 0.513 °C m–1. The cryoscopic constant (Kf) for water is 1.86 °C m–1. The vapor pressure of pure water is 0.0313 atm. Determine the following: Boiling point of solution (in °C to two decimal places) Freezing point of solution (in °C to two decimal places) Vapor pressure of the solution (in atm to three decimal places) Osmotic pressure (in atm to three decimal places)Although other solvents are available, dichloromethane(CH₂Cl₂) is still often used to “decaffeinate” drinks because thesolubility of caffeine in CH₂Cl₂ is 8.35 times that in water.(a) A 100.0-mL sample of cola containing 10.0 mg of caffeine is extracted with 60.0 mL of CH₂Cl₂. What mass of caffeine re-mains in the aqueous phase? (b) A second identical cola sampleis extracted with two successive 30.0-mL portions of CH₂Cl₂.What mass of caffeine remains in the aqueous phase after each extraction? (c) Which approach extracts more caffeine?
- Calculate the % relative error in solubility by using concentrations instead of activitiesfor Fe(OH)2 in 0.0500 M KNO3 (give the source for thermodynamic solubility).Barium hydroxide, Ba(OH)2, is reported to have a Ksp of 2.55x10-4 at 25 degrees ceslius. a) What is the molar solubility of Ba(OH)2? (Show all work) b) What is the solubility of Ba(OH)2 in g/L? (Show all work)Calculate the solubility at 25°C of BaCrO4 in pure water and in a 0.0050M BaCl2 solution. You'll find Ksp data in the ALEKS Data tab. Round both of your answers to 2 significant digits. Ksp of BaCrO4 = 1.17 x 10^-10