Stoichiometry Ii- Synthesis of a Coordination Compound

Stoichiometry II- Synthesis of a Coordination Compound
Report
〖CuSO〗_4 (s)→〖Cu〗^(2+) (aq)+ SO_4 (aq)^(2-)
Cu^(2+) (aq)+ 4NH_3 (aq)→[Cu(NH_3 )_4 ]^(2+)

[Cu(NH_3 )_4 ]^(2+)+ SO_4 (aq)^(2-)+H_2 O□(→┴(methanol solvent) ) [Cu(NH_3 )_4 ]SO_4*H_2 O

1.992 g 〖CuSO〗_4 (s) × (1 mol〖 CuSO〗_4 )/(159.6 g) = .0124 mol 〖CuSO〗_4 (s)
.0124 mol 〖CuSO〗_4 (s)×(1 mol [Cu(NH_3 )_4 ]SO_4*H_2 O )/(1 mol〖 CuSO〗_4 )×(245.74 g [Cu(NH_3 )_4 ]SO_4*H_2 O )/(1 mol [Cu(NH_3 )_4 ]SO_4*H_2 O )=3.047 g [Cu(NH_3 )_4 ]SO_4*H_2 O

% Yield Calculation: %yield=(actual yield (g))/(theoretical yield (g)) X 100= (2.64 g)/3.047×100= 86.64%

Reagent Mass (g) Moles (mol) Theoretical moles of Product (mol) Theoretical mass of Product (g) Actual Mass of Product
(g) % yield
〖CuSO〗_4 (s) 1.992 g .0124 mol .0124 mol 3.047 g 2.640 g 86.64%

Solubility of Precipitate ion
[Cu(NH_3 )_4 ]SO_4*H_2 O+Solvent Observation of Solubility
[Cu(NH_3 )_4 ]SO_4*H_2 O + Acetone When the precipitate ion was added to ~1 mL of acetone there was a strong property of insolubility. Even when a stir rod was used to mix the precipitate in the acetone, the precipitate remained un-dissolved in the solvent.
[Cu(NH_3 )_4 ]SO_4*H_2 O + DI Water When the precipitate ion was added to ~1 mL of DI water, the precipitate was partially soluble. The precipitate caused the liquid to become a deep blue color and the precipitate dissolved into the water with little remaining in the bottom of the test tube.
[Cu(NH_3 )_4 ]SO_4*H_2 O + Methanol When the precipitate ion was added to ~1 mL of Methanol the precipitate was only slightly soluble. Although the solvent changed slightly in color, the large majority of precipitate ion remained un-dissolved in the solvent.
[Cu(NH_3 )_4 ]SO_4*H_2 O + DI + HCl When ~1ml of 1.0 M HCl was added to the precipitate ion and DI solution, a light blue precipitate formed. The light blue precipitate appeared flakey, almost crystalline in nature at first, but after