--%>
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 : Basicity order order of decreasing

    order of decreasing basicity of urea and its substituents

    		•
  • Q : Einsteins mass energy relation In

    In Einstein’s mass energy relation e = mc2 for what is c employed or why is light needed for the reactions. As the reactions are with the help of neutrons?

    		•
  • Q : Molecular weight of substance The

    The boiling point of a solution of 0.11 gm of a substance in 15 gm of ether was found to be 0.1oC higher than that of the pure ether. The molecular weight of the substance will be (Kb = 2.16)       (a) 148 &nbs

    		•
  • Q : Electrochemistry ( electrolysis of

    1. Define Faraday's first law of electrolysis 2. define Faraday's second law of electrolysis

    		•
  • Q : Moles of HCl present in .70 L of a .33

    Detail the moles of HCl which are present in .70 L of a .33 M HCl solution?

    		•
  • Q : Questuion associated with colligative

    Provide solution of this question. Which of the following is a colligative property: (a) Surface tension (b) Viscosity (c) Osmotic pressure (d) Optical rotation

    		•
  • Q : Amines arrange in decreasing order of

    arrange in decreasing order of basicity pi pyridine,pyridine,pyrrole, morphine

    		•
  • Q : Preparation of ammonium sulphate Select

    Select the right answer of the question. Essential quantity of ammonium sulphate taken for preparation of 1 molar solution in 2 litres is: (a)132gm (b)264gm (c) 198gm (d) 212gm

    		•
  • Q : Mole fraction of hydrogen Give me

    Give me answer of this question. In a mixture of 1 gm H2 and 8 gm O2 , the mole fraction of hydrogen is: (a) 0.667 (b) 0.5 (c) 0.33 (d) None of these

    		•
  • Q : Question associated to vapour pressure

    Choose the right answer from following. The vapour pressure lowering caused by the addition of 100 g of sucrose(molecular mass = 342) to 1000 g of water if the vapour pressure of pure water at 25degree C is 23.8 mm Hg: (a)1.25 mm Hg (b) 0.125 mm Hg (c) 1.15 mm H

    		•