Timeline for Does copper(II) hydroxide dissolve in ammonia solution?
Current License: CC BY-SA 4.0
9 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jun 13 at 6:00 | comment | added | Poutnik | 1/ You have the given [NH3]. 2/ Calculate the equilibrium [OH-]. 3/ Calculate the equilibrium [Cu^2+]. 4/ Calculate the equilibrium [Cu(NH3)4^2+]. | |
| Jun 13 at 0:11 | comment | added | Shira | I don't quite get the idea. You mean that we should not calculate the equilibrium constant for the dissolution of copper(II) hydroxide by ammonia? | |
| Jun 12 at 19:43 | comment | added | Maurice | The equilibrium constant for the formation of copper(II) hydroxide is $\ce{[Cu^{2+}][OH-]^2}$, so it is expressed in $mol^3 L^{-3}$. The equilibrium constant for the formation of tetraamminecopper(II) is $\ce{\frac{[Cu(NH3)4^{2+}]}{[Cu^{2+}][NH3]^4}}$. It is expressed in $mol^{-4}L^{4}$ | |
| Jun 12 at 9:53 | comment | added | Shira | What do you mean by different unit? | |
| Jun 12 at 8:36 | comment | added | Maurice | The equilibrium constant for the formation of copper(II) hydroxide can hardly be compared to the formation of tetraamminecopper(II), because these two constants don't have the same unit. | |
| Jun 12 at 6:37 | comment | added | Poutnik | See also Schweitzer reagent and production of "copper silk". In the process, cellulose is dissolved in the ammonia solution of copper(II) hydroxide(dark violet). | |
| Jun 12 at 6:26 | comment | added | Poutnik | Have you done the calculation involving the provided constants? // Comparison of constants must consider also different stoichiometries and present concentrations.// CH SE questions are supposed to be self-contained, involving all essential info, with the links serving just as additional reference original text or for further reading. Questing alone should be fully valid even if links stopped working. | |
| Jun 12 at 5:40 | history | edited | andselisk♦ | CC BY-SA 4.0 |
added 122 characters in body; edited tags
|
| Jun 11 at 23:33 | history | asked | Shira | CC BY-SA 4.0 |