why bail blue of [Cu(H2O)6]^2+ can turn dark blue when ammonia solution is added?
When ammonia is slowly added to a light blue solution of CuSO4 (aq), at first a white precipitate forms. What is the formula of that precipitate? After more ammonia is added, a dark blue solution forms. What is the formula of the compound or ion responsible for the dark blue color?
1.25 g of CuSO4.5 H2O is treated with excess ammonia, when a deep blue solution is obtained. To this solution 5 mis of ethanol is added and the solid copper sulfate tetramine sulfate is obtained on filtration using a Buchner filter. On drying, the mass of the filter paper (085g) and compound is found to be 1.12 grams Calculate the percent yield? [6]
why is a solution of Cu (II) sulfate blue? Explain with electrons and orbitals.
2. Consider the following equilibrium represent by the reversible equation below: Cu?"(aq) + 4 NH OH(aq) = [Cu(NH3)4]?" (aq) + 4 H2O(1) Blue Colorless Navy blue Predict the shift (explain why) and indicate the color of the solution when a. Drops of strong acid is added b. H2S gas is bubbled in the solution. Note: H2S reacts with transition metal cations. c. Water is added to the mixture at equilibrium.
2. Consider the following equilibrium represent by the reversible equation below: Cu²+(aq) + 4 NH4OH(aq) = [Cu(NH3)4]2+(aq) + 4 H2O(1) Blue Colorless Navy blue Predict the shift (explain why) and indicate the color of the solution when a. Drops of strong acid is added b. H2S gas is bubbled in the solution. Note: H2S reacts with transition metal cations.
When ammonia is added to Zn(NO3)2 solution, a white precipitate forms, which dissolves on the addition of excess ammonia; but when ammonia is added to a mixture of Zn(NO3)2 and NH4NO3 no precipitate forms at any time. Suggest an explanation for this difference in behavior.
In step1, aqueous ammonia is added to a solution of the three ions. The equilibrium for the ammonia is EQ1: NH3(aq + H2O(l) ßà NH4+(aq) Kb=1.8x10-5 The bismuth(III) ion is precipitated out of the solution as Bi(OH)3. The equilibrium involved is related to the one provided below: EQ2: Bi(OH)3(s) ßà Bi3+(aq) +3OH(aq)- Ksp =3.2x10-40 Manipulate EQ 1 and 2 to solve for the net equation, EQ3: EQ3 (net): 3H2O+ Bi3+(aq) +3NH3(aq) ßàBi(OH)-(s) +3NH4+(aq) Write the mass law expression for the...
40. Concentrated aqueous ammonia is added to a solution of copper(II) sulfate. A white precipitate forms. The precipitate dissolves as more ammonia is added, generating an intensely blue solution. Which combination of net ionic equations, in the appropriate order, describes this chemistry?! I Cu?* (aq) + 2OH(aq) Cu(OH)2 (19) II Cu?" (aq) + 2OH(aq) = Cu(OH)2 (8) III Cu(OH)(aq) + 4 NH, (aq) Cu(NH3),?* () + 2OH(aq) IV Cu(OH)2 (8) + 4NH, (aq) Cu(NH3)*(14) + 2OH(aq) V NH3(aq) + H20...
1. Why does Al(OH)3 and Fe(OH), precipitate from the ammonia buffer system, while Cu(OH)2 does not? 2. What will likely happen if excess NaOH is added to a solution containing Cu, Fe, and Al ions? 3. What is the name of the C20, ion? What is its Lewis structure? 4. How can the K ion be positively identified? 5. Combine the K, and K, equilibria for AgCl and Ag(NH3)2 respectively and demonstrate Hess's law to determine the equilibrium constant for the dissolution of AgCl...
"calculate the concentration of Ag+ present in a solution at equilibrium when concentrated ammonia is added to a 0.010m solution of AgNO3 to give an equilibrium concentration of (NH3)= 0.20 m. Neglect the small volume change that occurs when NH3 is added