--%>
Assignment Help - homework help

Explain preparation and properties of phosphorus trichloride

It may be prepared by the action of phosphorus on thionyl chloride.

P4 + 8SOCl2  816_Phosphorus trichloride.png  4OCl3 + 4SO2 + 2S2Cl2
    
Lab. Method: it is more conveniently prepared in the laboratory by heating white phosphorus in a current of dry chlorine when phosphorus trichloride distils over.

P4 + 6Cl2  816_Phosphorus trichloride.png  4PCl3

Phosphorus is gently heated in a retort on a water bath and current dry chlorine is passed. Phosphorus trichloride distils over and is collected in a receiver cooled in freezing mixture.

It is redistilled over white phosphorus to remove any phosphorus pentachloride present an impurity.

Properties
    
It is colourless fuming liquid.
    
It reacts violently with water forming phosphorus acid.

PCl3 + 3HOH  816_Phosphorus trichloride.png  H3PO3 + 3HCl
    
It reacts with concentrated H2SO4 forming chlorosulphonic acid.
    
1292_Phosphorus trichloride1.png 

Or, 2H2SO4 + PCl3  816_Phosphorus trichloride.png  HSO3Cl + HPO3 + SO2 + HCl
    
It reacts with organic compounds containing hydroxyl group.

2328_Phosphorus trichloride2.png 
    
It directly combines with Cl2, O2 and S. this indicates that it is an unsaturated compound.

PCl3 + Cl2  816_Phosphorus trichloride.png  PCl5

2PCl3 + O2  816_Phosphorus trichloride.png  2POCl3

PCl3 + S  816_Phosphorus trichloride.png  PSCl3
    
It acts as a reducing agent.

PCl3 + SO2Cl2  816_Phosphorus trichloride.png  PCl5 + SO2

PCL3 + SO3  816_Phosphorus trichloride.png  POCL3 + SO2

3PCl3 + S2Cl2  816_Phosphorus trichloride.png  PCL5 + 2PSCl3

It reacts with finely divided metals when hot.

12Ag + 4PCl3  816_Phosphorus trichloride.png  12AgCl + P4

6Na + PCl3  816_Phosphorus trichloride.png  3NaCl + Na2P

 

   Related Questions in Chemistry

  • Q : What do you mean by the term enzymes

    What do you mean by the term enzymes? Briefly illustrate it.

    		•
  • Q : What is ortho effect? Orthosubstituted

    Orthosubstituted anilines are generally weaker bases than aniline irrespective of the electron releasing or electron withdrawing nature of the substituent. This is known as ortho effect and may probably be due to combined electronic and steric factors.The overall basic strength of ort

    		•
  • Q : Explain methods for industrial

    The important methods for the preparation of alcohol on large-scale are given below:    

    		•
  • Q : Molarity of Barium hydroxide 25 ml of a

    25 ml of a solution of barium hydroxide on titration with 0.1 molar solution of the hydrochloric acid provide a litre value of 35 ml. The molarity of barium hydroxide solution will be: (i) 0.07 (ii) 0.14 (iii) 0.28 (iv) 0.35

    		•
  • Q : Problem on equilibrium constant Ethanol

    Ethanol is manufactured from carbon monoxide and hydrogen at 600 K and 20 bars according to the reaction2 C0(g) + 4 H2(g) ↔ C2H5OH(g) + H2O (g)The feed stream contains 60 mol% H2, 20 m

    		•
  • Q : Meaning of molality of a solution The

    The molality of a solution will be: (i) Number of moles of solute per 1000 ml of solvent (ii) Number of moles of solute per 1000 gm of solvent (iii) Number of moles of solute per 1000 ml of solution (iv) Number of gram equivalents of solute per 1000 m

    		•
  • Q : Haloalkane how haloalkane can be

    how haloalkane can be prepared by refluxing alcohol with hydrohalic acids

    		•
  • Q : 6. 20 gm of hydrogen is present in 5

    6. 20 gm of hydrogen is present in 5 litre vessel. The molar concentration of hydrogen is

    		•
  • Q : Benefits of soapy detergents over the

    What are the benefits of soapy detergents over the soap less detergents? Briefly state the benefits?

    		•
  • Q : Some basic concepts of chemistry an

    an atom of an element is 10.1 times heavier than the mass of a carbon atom.What is its mass in amu?

    		•