#3 R&D Exp. 26 Should Cu(OH)2 precipitate in 3 M NH3 if the original [Cu2+] is...

#3 R&D Exp. 26

Should Cu(OH)₂ precipitate in 3 M NH₃ if the original [Cu²⁺] is 0.1 M ( the K_b for ammonia is 1.6x10^-5)?

Please show work and explain a little of how you got this result

Expert Solution

In the above problem volumes are not mentioned, so we will consider that volume will remian almost constant even after mixing the two.

Now

NH3 + H2O --> NH4+ + OH-
initial 3M 0 0

equilibrium 3-x x x
Kb = [NH4][OH-]/[NH3] = 1.6X10^-5 = [x][x]/[3-x]

Its a weak base so x<<1

1.6X10^-5 = x^2 / 3

x^2 = 48X10^-6

x = 6.92X10^-3 = [OH-]

Now Ksp of copper hydroxide is

Cu(OH)2 <-----> Cu2+ + 2OH- Ksp = 4.8X10^-20

And Ionic product = [Cu+2][OH-] = 0.1 X 6.92X10^-3 = 6.92X10^-4

IP >>Ksp

so precipitate will form

queen_honey_blossom answered 8 months ago

Cu +2 OH --> Cu(OH)2 Cu+ 6 NH3 -->Cu(NH3)6 add drops of 6 m NH3 until...

Cu +2 OH --> Cu(OH)2 Cu+ 6 NH3 -->Cu(NH3)6 add drops of 6 m NH3 until a change is observed. a) what is happening at the molecular level when NH3 is added? How are the positions of equilibrium affected for both equations 1 and 2? explain. b) Add drops of 6 M HCl until a change is observed. stir the solution as you add HCL. What will you observe? c) what is happening at the molecular level when the HCl...

Calculate the equilibrium concentrations of NH3, Cu2+, [Cu(NH3)]2+, [Cu(NH3)2]2+, [Cu(NH3)3]2+, and [Cu(NH3)4]2+ in a solution made...

Calculate the equilibrium concentrations of NH3, Cu2+, [Cu(NH3)]2+, [Cu(NH3)2]2+, [Cu(NH3)3]2+, and [Cu(NH3)4]2+ in a solution made by mixing 500.0 mL of 3.00 M NH3 with 500.0 mL of 2.00 x 10-3 M Cu(NO3)2. The sequential equilibria are Cu2+ (aq) + NH3(aq) ⇐⇒ [Cu(NH3)]2+ (aq) K1 = 1.86 x 104 [Cu(NH3)]2+ (aq) + NH3(aq) ⇐⇒ [Cu(NH3)2]2+ (aq) K2 = 3.88 x 103 [Cu(NH3)2]2+ (aq) + NH3(aq) ⇐⇒ [Cu(NH3)3]2+ (aq) K3 = 1.00 x 103 [Cu(NH3)3]2+ (aq) + NH3(aq) ⇐⇒ [Cu(NH3)4]2+ (aq)...

Given equations: (1) Cu2+ (aq) + 2 OH- aq) ⇌ Cu(OH)2 (s) (2) Cu2+ (aq) +...

Given equations: (1) Cu2+ (aq) + 2 OH- aq) ⇌ Cu(OH)2 (s) (2) Cu2+ (aq) + 6 NH3 (aq) ⇌ Cu(NH3)62+ (aq) In a test tube of~1mL of Cu2+ solution was added to it (CuSO4). Several drops of 6 M NaOH were added to the copper solution until the precipitate Cu(OH)2 was observed. Are all the Cu2+ ions part of the precipitate? Explain. Then drops of 6M NH3 until a change was observed. You may need to stir your test...

When ammonia is added to a solution that has Cu(OH)2(s) precipitate in it, the precipitate dissolves....

When ammonia is added to a solution that has Cu(OH)2(s) precipitate in it, the precipitate dissolves. Use Le Châtelier’s principle to explain this.

what reaction type is Cu2+ + OH- ---> Cu(OH)2 CuSO4 x 5H2O ----> CuSO4 CuSO4 ------>...

what reaction type is Cu2+ + OH- ---> Cu(OH)2 CuSO4 x 5H2O ----> CuSO4 CuSO4 ------> CuSO4 x 5H2O NH4Cl -----> NH3 + HCl Reaction Type Options are: 1. Combination, Synthesis or Formation Reaction 2. Decomposition Reaction 3. Single Displacement or Single Replacement Reaction 4. Double Displacement or Double Replacement Reaction

A solution contains 2.2x10^-3 M Cu2+ and 0.33 M LiCN. If the Kf for Cu(CN)4^2- is...

A solution contains 2.2x10^-3 M Cu2+ and 0.33 M LiCN. If the Kf for Cu(CN)4^2- is 1.0x10^25, how much copper ion remains at equilibrium?

Cu in [Cu(CN)4]2- and [Cu(NH3)4]2+ has d9 electron configuration ,so the geometry should be tetrahedral but...

Cu in [Cu(CN)4]2- and [Cu(NH3)4]2+ has d9 electron configuration ,so the geometry should be tetrahedral but the experiment Show that these two ions have square planar geometry.Please explain this statement.

What is the coordination number for each of the following complexes or compounds? [Co(NH3)4(H2O)2]3+[Co(NH3)4(H2O)2]3+ [Mg(EDTA)]2−[Mg(EDTA)]2− [Cu(NH3)4]2+[Cu(NH3)4]2+...

What is the coordination number for each of the following complexes or compounds? [Co(NH3)4(H2O)2]3+[Co(NH3)4(H2O)2]3+ [Mg(EDTA)]2−[Mg(EDTA)]2− [Cu(NH3)4]2+[Cu(NH3)4]2+ [Ag(NH3)2]NO3[Ag(NH3)2]NO3 Enter the coordination numbers, in the order that the complexes are listed, as four integers separated by commas (e.g., 1,2,3,4). View Available Hint(s) Submit Part B What is the charge on each of the following complex ions? hexaaquamanganese(II), [Mn(H2O)6]?[Mn(H2O)6]? tris(carbonato)cobaltate(III), [Co(CO3)3]?[Co(CO3)3]? amminepentabromoplatinate(IV), [Pt(NH3)Br5]?[Pt(NH3)Br5]? Express the charges numerically, in the order that the complexes are listed, separated by commas. For a nonzero charge, be...

The complex ion Cu(NH3)42 is formed in a solution made of 0.0400 M Cu(NO3)2 and 0.400...

The complex ion Cu(NH3)42 is formed in a solution made of 0.0400 M Cu(NO3)2 and 0.400 M NH3. What are the concentrations of Cu2 , NH3, and Cu(NH3)42 at equilibrium? The formation constant*, Kf, of Cu(NH3)42 is 1.70 × 1013.

The complex ion Cu(NH3)42 is formed in a solution made of 0.0200 M Cu(NO3)2 and 0.400...

The complex ion Cu(NH3)42 is formed in a solution made of 0.0200 M Cu(NO3)2 and 0.400 M NH3. What are the concentrations of Cu2 , NH3, and Cu(NH3)42 at equilibrium? The formation constant*, Kf, of Cu(NH3)42 is 1.70 × 1013.

Question