Explain about hydrogen sulphide, Chemistry

Q. Explain about Hydrogen Sulphide?

Hydrogen sulphide is the only thermodynamically stable sulphane. It is a foul smelling and poisonous gas.

H2S is prepared in the laboratory by treating FeS with dilute HCI in Kipp's apparatus. In aqueous solution H, S is a weak acid. At 293 K, it dissociates as shown below: 

740_Hydrogen Sulphide.png

You must have used H2S in qualitative identification and separation of cations. This separation is based on selective precipitation of the sulphides in acidic and alkaline medium:  In the acidic medium, the ionisation of H2S which is a weak acid, is further suppressed and the solubility product of sulphides of relatively less soluble cations of Group 11, namely.  Pb2+, Hg2+, Bi3+, Cu2+ , Cd2+ . As3+, Sb3+, Sn+2 is exceeded:

1988_Hydrogen Sulphide1.png

In Group IV, in the presence of ammonia, a higher concentration of S2- ions is obtained leading to the precipitation of the more soluble sulphides of Zn, Mn, Ni and Co.

73_Hydrogen Sulphide2.png

Posted Date: 7/8/2013 4:14:59 AM | Location : United States







Related Discussions:- Explain about hydrogen sulphide, Assignment Help, Ask Question on Explain about hydrogen sulphide, Get Answer, Expert's Help, Explain about hydrogen sulphide Discussions

Write discussion on Explain about hydrogen sulphide
Your posts are moderated
Related Questions
Q. Describe Structure of Solids? Ans. Solids are different from gases and liquids because they have a fixed shape. This definite shape occurs as the individual particles w

Which of the following compounds are covalent: (1)  H 2                                                  (2) CaO                         (3)  KCL


You make up 0.100 L of a buffer having 1.00 M acetic acid and 1.10 M sodium acetate. The Ka of acetic acid is 1.8 x 10-4. (a) Determine the pH of this buffer.

Classification of polymers - On the basis of structure On the basis of structure of polymers these can be classified as (i) Linear polymers      (ii) Branched chain polym


How is 7.979 times 10 to the 4th in scientific notation for the ordinary notation: 7979?

The energy of a photon is calculated by: (1) E= hv (2) h= Ev (3) h = E/v (4) E= h/v Ans: E= hv

What will happen if you mix nitrogen and hydrogen gas at room temperature? Explain your reasoning. Calculate the mole fraction of NH 3 that would form theoretically at 298.15

Preparation of saturated calomel electrode and determination of standard potentials of electrodes such as Cu 1 Cu, Zn 1 Zn, etc. Comparison of the potential values with values from