Advertisements
Advertisements
प्रश्न
What is the coordination entity formed when excess of aqueous KCN is added to an aqueous solution of copper sulphate? Why is it that no precipitate of copper sulphide is obtained when H2S(g) is passed through this solution?
Advertisements
उत्तर
When aqueous KCN solution is added to aqueous copper sulphate solution, [Cu(CN)4]2− coordination species is obtained as follows:
\[\ce{[Cu(H2O)4]^2+ + 4CN- -> [Cu(CN)4]^2- + 4H2O}\]
The coordination species thus formed [Cu(CN)4]2− is very stable because CN– is a strong ligand. Hence, on passing H2S gas through this solution, CuS precipitate is not obtained because free Cu2+ ions are unavailable.
संबंधित प्रश्न
Classify the following ligands into monodentate and polydentate —
- Ammonia
- Carbon monoxide
- Ethylene diamine
- Ethylene diamine tetra acetate ion
Amongst the following, the most stable complex is:
Following compounds are given to you :
2-Bromopentane, 2-Bromo-2-methylbutane, 1-Bromopentane
1) Write the compound which is most reactive towards SN2 reaction.
2) Write the compound which is optically active.
3) Write the compound which is most reactive towards β-elimination reaction.
Write IUPAC name of the following Complex [Cr(NH3)3Cl3]
Complete the following reactions
NH3+3Cl2(excess) ---->
Write the structures of compounds A, B and C in the following reactions
Ligand (en) is an example of ___________.
A group of atoms can function as a ligand only when:
The oxidation number of Fe in K4[Fe(CN)6] is ____________.
Which of the following is non-ionizable?
When 0.1 mol \[\ce{CoCl3 (NH3)5}\] is treated with excess of \[\ce{AgNO3}\], 0.2 mol of \[\ce{AgCl}\] are obtained. The conductivity of solution will correspond to ______.
Which of the following complexes are homoleptic?
(i) \[\ce{[Co(NH3)6]^{3+}}\]
(ii) \[\ce{[Co(NH3)4 Cl2]^{+}}\]
(iii) \[\ce{[Ni(CN)4]^{2-}}\]
(iv) \[\ce{[Ni(NH3)4Cl2]}\]
What is the relationship between observed colour of the complex and the wavelength of light absorbed by the complex?
The nature of hybridisation in the ammonia molecule is
The most stable ion is ______.
How many ions are produced from the complex Co(NH3)6]Cl2 in solution?
The equivalents of ethylene diamine required to replace the neutral ligands from the coordination sphere of the trans-complex of CoCl3.4NH3 is ______. (Round off to the Nearest Integer).
Does ionization isomer for the following compound exist? Justify your answer.
\[\ce{Hg[Co(SCN)4]}\]
In the complex ion \[\ce{[CoCl(en)2ONO]+}\], the coordination number and the oxidation number of the central metal ion are ______ and ______.
What is meant by ambidentate ligand?
