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22 solutions

Selective Precipitation

Q. A solution contains 0.0010 M AgNO3 and 0.010 M Pb(NO3)2. Both cations may be precipitated out from the solution by adding dilute sodium chloride or hydrochloric acid. (a) Which compound will precipitate out first, AgCl or PbCl2? Explain. (b) What is the concentration of Ag+ when PbCl2 begins to precipitate? (c) What is the concentration of Pb2+ when AgCl begins to precipitate? (AgCl, Ksp = 1.6 x 10-10; PbCl2, Ksp = 1.6 x 10-5)

Solved • Aug 8, 2019

Selective Precipitation

Q. A solution is prepared by mixing 50.0 mL of 0.50 M Cu(NO3)2 with 50.0 mL of 0.50 M Co(NO3)2. Sodium hydroxide is slowly added to the mixture. Which precipitates first? [Ksp(Cu(OH)2) = 2.2 x 10^-20, Ksp(Co(OH)2) = 1.3 x 10^-15] a. Co(OH)2 b. Co(NO3)2 c. Cu(NO3)2 d. Cu(OH)2 e. No precipitate is formed.

Solved • Jul 30, 2019

Selective Precipitation

Q. When NaF is slowly to a solution that is 0.025 M Ba2+ and 0.025 M Ca2+ what will the concentration of calcium be when the barium just begins to precipitate?

Solved • Jul 23, 2019

Selective Precipitation

Q. The solubility product, Ksp, for BaCrO4 is 1.2 x 10-10. An aqueous solution is prepared by mixing barium(II) and chromate ions. This solution has a reaction quotient, Q, of 1.7 x 10-10. Will a precipitate form? Explain. A precipitate _____ form because the reaction quotient, Q, is _____ the solubility product, Ksp.

Solved • Jul 16, 2019

Selective Precipitation

Q. The Ksp of AgCl at 25°C is 1.6 x 10^-10. Consider a solution that is 1.0 x 10^-5 M CaCl2 and 1.0 x 10^-6 M AgNO3. 1. Q < Ksp and a precipitate will form. 2. The solution is saturated. 3. Q < Ksp and a precipitate will not form. 4. Q > Ksp and a precipitate will form. 5. Q > Ksp and a precipitate will not form.

Solved • Jul 12, 2019

Selective Precipitation

Q. The Ksp of AgCl at 25°C is 1.6 x 10^-10. Consider a solution that is 1.0 x 10^-7 M CaCl2 and 1.0 x 10^-3 M AgNO3. 1. Q > Ksp and a precipitate will form. 2. Q < Ksp and a precipitate will form. 3. Q < Ksp and a precipitate will not form. 4. Q > Ksp and a precipitate will not form. 5. The solution is saturated.

Solved • Jul 12, 2019

Selective Precipitation

Q. The Ksp of CaF2 at 25°C is 4 x 10^-11. Consider a solution that is 1.0 x 10^-3 M Ca(NO3)2 and 3.0 x 10^-4 M NaF. a. Q > Ksp and a precipitate will not form. 2. The solution is saturated. 3. Q > Ksp and a precipitate will form. 4. Q < Ksp and a precipitate will form. 5. Q < Ksp and a precipitate will not form.

Solved • Jul 12, 2019