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An unknown white solid is either NaC2H3O2, AgNO3 or BaCl2. The white solid dissolves in water. The dissolved unknown precipitates when either aqueous potassium carbonate or aqueous lithium bromide is added. What is the unknown? Please show balanced reactions (with subscripts for the physical states) for all the precipitation reactions.
Note that the absolute stereochemical configurations of chiral substances cannot be determined from the data. Arbitrarily draw a configuration for an enantiomer (and be consistent with the derivatives); omit wedge/dash bonds for a racemate.
The insecticide DDT has a half-life in the human body of about 7 years. That is, in 7 years its concentration.( Although DDT is no longer in use in the United States).
6 moles of a mixture that contains 0.7 mole fraction propane (C3H8) with the remainder methane (CH4). It is burned in air with a 10% excess of oxygen.
a 1.000 g sample of a certain mixture is 75% (by mass) potassium sulfate and 25% of an unknown sulfate with formula MSO4. the unknown is dissolved and precipitated with barium ions. If 1.489g of precipitate is collected, what is the identity of M
A solution is prepared by mixing 70.0 mL of 0.010 M BaCl2 and 175 mL of 0.080 M K2SO4. What are the concentrations of barium and sulfate ions in this solution? Assume only SO42- ions (no HSO4? ) are present.
Pyridine(C5H5N) is a weaker base in H2O than 2,6 lutidine (dimethylpyridine), but we observe that the pyridine-BF3 complex is more stable than the comparable lutidine-BF3. Explain the reason for this inversion in stabilities.
Assuming the turbine is well insulated, what is the maximum power that can be generated by the turbine?
The concentration of Mg2+ in seawater is 0.052 M. At what pH will 77% of the Mg2 be precipitated as the hydroxide salt? [Ksp for Mg(OH)2 = 8.9 10-12.]
Certain metal cations can act as Lewis acids in water to produce an acidic solution even though the metal ion contains no hydrogen ions at all.
The contents of the tank are transferred without loss to an evacuated 55 L tank in scold room where the temperature is 4 degree C . What is the pressure in the tank ?
Suppose that two equal volumes of 0.2 molar NaCl (aq) solutions are separated by a membrane and that the left -hand compartment of the experimental arrangement contains a polyelectrolyte molecule Na6P at a concentration of 50 g/liter
Find out how many total moles of gas are produced If a sample has 2.10 mL of nitroglycerine (density = 1.592 g/mL) is detonated?
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