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Carboxylic acids and phenols can be separated by chemically active extraction if the pH of the aqueous layer is properly chosen. Phenols are sufficiently acidic to be extracted into aqueous sodium hydroxide, but not into aqueous sodium bicarbonate, while the more acidic carboxylic acid can be extracted into aqueous sodium bicarbonate. Amines can be extracted from organic solvents by dilute aqueous acid because of the formation of polar ammonium salts. Construct a detailed flow diagram showing how you would separate a mixture of benzoic acid, p-bromophenol, aniline, and naphthalene.
Find the total pressure for a mixture that contains four gases with partial pressures of 5.38 kPa, 4.52 kPa, 3.16 kPa, and 1.23 kPa.
Autoclave that are used to sterilize surgical tools require a tempereature of 120 degree to kill bacteria. At what presure must they operate?
Two weak acids, HA (pKa=3.0) and HB (pKa=5.0) have equal partition coefficients for extraction from water to n-octanol. an aqueous solution with equal concentrations of HA and HB is extracted with n-octanol
What role do the potassium chloride (KCl) and potassium sulfate (K2SO4) play in this experiment
A gas occupies a volume of 458 mL at a pressure of 1.01 kPa and a temperature of 295 K. When the pressure is changed, the volume becomes 477 mL.
Consider the reaction 2ZnS + 3O2 → 2ZnO + 2SO2. Suppose that you wanted enough O2 to completely react with 500. g of ZnS.
calculate the parts per thousand deviation in ml. for the three titrations. b) Would an additional titration be advisable? give a reason?
A cube of Al is needed to have the mass of 93.5. What must be the length of the cube's edge in cm?
At 25C, the vapor pressure of diethyl ether is higher than the vapor pressure of its isomer n-butanol. Why?
after the correct formula for a reactant in an equation has been written , what can be changed to balance the equation?
How would you expect the amino acids glycine, alanine, and phenylalanine to travel relative to each other on the silica plates using a mixture of chloroform/methanol/ammonia? Explain your answer.
A car is filled with 15.0 gal of gas and is driven 210 miles. How much gas is left if the car averages 24.1 mi/gal?
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