Homework Answers
Ksp is the solubility product constant.It represent soluble of solid substance in aqueous solution . Substance having higher Ksp value is soluble more rapidly to its constituent ions
From above Ksp value it's shown that Ksp value is higher for ZnCO3 then CuCO3 and least for PbCO3
So ,PbCO3 being the lowest Ksp value will soluble less and that's why precipitate first and then CuCO3 and lastly ZnCO3
So 3rd option is the correct option
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Question 10 1 pts A solution contains Pb?, Cu2+ and Zn2+ ions. An aqueous solution of...
Question 10 1 pts A solution contains Pb2+, Cu2+ and Zn2+ ions. An aqueous solution of...
Question 10 1 pts A solution contains Pb2+, Cu2+ and Zn2+ ions. An aqueous solution of Na2CO3 is added slowly, one drop at a time. Which statement(s) is/are true? Select all. Kso PbCO3 7.4 x 10-14 CUCo3 3 x 10-12 ZnCO3 1.0 x 10-10 O All of the metal carbonates will precipitate at the same time. The precipitates will form in this order: ZnCO, then Cuco, then PbCO The precipitates will form in this order:PbCo, then Cuco, then Znco, The...
Question 6 1 pts Solid Pb(NO3)2 is added to a solution that contains CO2- anions. Which...
Question 6 1 pts Solid Pb(NO3)2 is added to a solution that contains CO2- anions. Which best describes the condition when PbCO3 precipitates out of the solution? Ksp of PbCO3 is 7.4 x 10-14 Ksp of PbCO3 Qof PbCO3 Qof Pbcoз > Ksp of PЬCOЗ Qof Pbco <Ksp of PЬCOЗ
A solution contains 0.100 mM of Ni2+ and Zn2+. Hydroxyl ions are slowly added to this...
A solution contains 0.100 mM of Ni2+ and Zn2+. Hydroxyl ions are slowly added to this solution to precipitate either Ni(OH)2 or Zn(OH)2. Determine which ion precipitates first at the pH range from 0-14 and the range of OH- concentrations that will allow a clean separation of the two ions. Ksp for Ni(OH)2=6x10^-16 and for Zn(OH)2 Ksp=3x10^-16
pt Solid Na SO, is added slowly to a solution that is 0.76M in Pb(NO3), and...
pt Solid Na SO, is added slowly to a solution that is 0.76M in Pb(NO3), and 0.45M in Ba (NO3),. In what order will solid PbSO4 and BaSO4 form? Calculate the percentage of Ba2+ that precipitates just before PbSo, begins to precipitate. Assume that Ksp (PbSO4) = 1.8 x 10-8 and Kg (BaSO4) = 1.1 x 10-20 will precipitate first. pe Percentage =
7. (20 pts) A scientist has 100 mL of a solution that contains four metal ions,...
7. (20 pts) A scientist has 100 mL of a solution that contains four metal ions, Ca2, Cu2, Pb2, and K*. He takes 50 mL and adds 2.5 grams of Na2SO4 which precipitates the Ca2 and the Pb2. This precipitate is filtered form the solution and redissolved in 20 mL of 6 M HNO3. He then adds 20 mL of 1.005 M EDTA and back titrates with 23.54 mL of 0.1954 M Zn2 He then adds a masking agent that...
A solution containing a mixture of metal cations was treated as outlined. 1. Dilute HCl was...
A solution containing a mixture of metal cations was treated as outlined. 1. Dilute HCl was added and a precipitate formed. The precipitate was filtered off. 2. H,S was bubbled through the acidic solution. Again, a precipitate formed and was filtered off. 3. The pH was raised to about 9 and H,S was again bubbled through the solution. No precipitate formed. 4. Finally, sodium carbonate was added. A precipitate formed and was filtered off. What can be said about the...
A solution contains .04 M Ca+, .04 M Zn2+, and .04 M Ni2+ ions. A) If...
A solution contains .04 M Ca+, .04 M Zn2+, and .04 M Ni2+ ions. A) If you separate them using (NH4)2C2O2, which ion will precipitate first as an oxalate? Consider Ksp Values for CaC2O4, ZnC2O4, and NiC2O4. CaC2O4 Ksp = 1.3 x 10^-9 ZnC2O4 Ksp = 1.5 x 10^-9 NiC2O4 Ksp = 4.0 x 10^-10 B) Calculate the concentration of the oxalate ion when the first cation (Ca2+, Zn2+, or Ni2+ begins to precipitate. C) Explain why ZnC2O4 and NiC2O4...
Question 10 The equilibrium of a ZnS precipitate with an aqueous solution of Zn2+ where H2S...
Question 10 The equilibrium of a ZnS precipitate with an aqueous solution of Zn2+ where H2S gas is bubbled through the solution is described by the following chemical equation and equilibrium constant Zn(s) + 2H+ (aq) = Zn2+ (aq) + H250g) K25 t = 0.11 Given that the Zn ion concentration in the solution is 100 10-6 M with a pH of 4.0. if the partial pressure of H2S is 0 01 am then, the solution is undersaturated and a...
An acidic solution is 2 mM in each of the following metal ions: Zn2+, Cu2+, Co2+,...
An acidic solution is 2 mM in each of the following metal ions: Zn2+, Cu2+, Co2+, Ca2+. a) Which of the metals would precipitate as their hydroxides at pH = 6.00? (Select all that apply. See theappendix.) -zinc -copper -cobalt -calcium b) Which of the metals would precipitate as their hydroxides at pH = 8.00? -zinc -copper -cobalt -calcium c) At what pH do the metal hydroxides begin to participate? Zn(OH)2 ____ Cu(OH)2 ____ Co(OH)2 ____ Ca(OH)2 ____ Substance Ksp...
An aqueous solution contains 0.034 M Brand 0.079 MT. A chemist wishes to do a fractional...
An aqueous solution contains 0.034 M Brand 0.079 MT. A chemist wishes to do a fractional precipitation experiment in which he slowly adds Pb+2, which can form ppts of PbBr2 (s) [Ksp = 4.6 x 106 and Pbl2(S) [Ksp= 8.4 x 10 °). Which of the following is entirely correct? a. I precipitates first when [Pb2+1 = 3.4 x 10-7M b. Br precipitates first when [Pb2+] = 1.4 x 10-4M c. I'precipitates first when [Pb2+] = 1.1 x 10-7M d....
Question 10 1 pts A solution contains Pb2+, Cu2+ and Zn2+ ions. An aqueous solution of Na2CO3 is added slowly, one drop at a time. Which statement(s) is/are true? Select all. Kso PbCO3 7.4 x 10-14 CUCo3 3 x 10-12 ZnCO3 1.0 x 10-10 O All of the metal carbonates will precipitate at the same time. The precipitates will form in this order: ZnCO, then Cuco, then PbCO The precipitates will form in this order:PbCo, then Cuco, then Znco, The...
Question 6 1 pts Solid Pb(NO3)2 is added to a solution that contains CO2- anions. Which best describes the condition when PbCO3 precipitates out of the solution? Ksp of PbCO3 is 7.4 x 10-14 Ksp of PbCO3 Qof PbCO3 Qof Pbcoз > Ksp of PЬCOЗ Qof Pbco <Ksp of PЬCOЗ
pt Solid Na SO, is added slowly to a solution that is 0.76M in Pb(NO3), and 0.45M in Ba (NO3),. In what order will solid PbSO4 and BaSO4 form? Calculate the percentage of Ba2+ that precipitates just before PbSo, begins to precipitate. Assume that Ksp (PbSO4) = 1.8 x 10-8 and Kg (BaSO4) = 1.1 x 10-20 will precipitate first. pe Percentage =
7. (20 pts) A scientist has 100 mL of a solution that contains four metal ions, Ca2, Cu2, Pb2, and K*. He takes 50 mL and adds 2.5 grams of Na2SO4 which precipitates the Ca2 and the Pb2. This precipitate is filtered form the solution and redissolved in 20 mL of 6 M HNO3. He then adds 20 mL of 1.005 M EDTA and back titrates with 23.54 mL of 0.1954 M Zn2 He then adds a masking agent that...
A solution containing a mixture of metal cations was treated as outlined. 1. Dilute HCl was added and a precipitate formed. The precipitate was filtered off. 2. H,S was bubbled through the acidic solution. Again, a precipitate formed and was filtered off. 3. The pH was raised to about 9 and H,S was again bubbled through the solution. No precipitate formed. 4. Finally, sodium carbonate was added. A precipitate formed and was filtered off. What can be said about the...
Question 10 The equilibrium of a ZnS precipitate with an aqueous solution of Zn2+ where H2S gas is bubbled through the solution is described by the following chemical equation and equilibrium constant Zn(s) + 2H+ (aq) = Zn2+ (aq) + H250g) K25 t = 0.11 Given that the Zn ion concentration in the solution is 100 10-6 M with a pH of 4.0. if the partial pressure of H2S is 0 01 am then, the solution is undersaturated and a...
An aqueous solution contains 0.034 M Brand 0.079 MT. A chemist wishes to do a fractional precipitation experiment in which he slowly adds Pb+2, which can form ppts of PbBr2 (s) [Ksp = 4.6 x 106 and Pbl2(S) [Ksp= 8.4 x 10 °). Which of the following is entirely correct? a. I precipitates first when [Pb2+1 = 3.4 x 10-7M b. Br precipitates first when [Pb2+] = 1.4 x 10-4M c. I'precipitates first when [Pb2+] = 1.1 x 10-7M d....
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