ChemistryA solution containing 1 g of the complex CoNH36Cl3 was passed through a cation exchanger. The acidliberated was made up to one litre. Find out the strength of the acid solution  (At. wt., Co=58.9,Cl=35.5,N=14,H=1 ) 

A solution containing 1 g of the complex CoNH36Cl3 was passed through a cation exchanger. The acid

liberated was made up to one litre. Find out the strength of the acid solution 

 (At. wt., Co=58.9,Cl=35.5,N=14,H=1 ) 

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    Solution:

    Molar mass of complex CoNH36Cl3=58.9+6[14+(3×1)]+3(35.5)=266.4gmol.

    When solution of above complex is passed through cation exchanger, HCl is produced according to the following reactions. 

    CoNH36Cl3CoNH363++3Cl  1mol3mol3mol  3H+3Cl3HCl

    (From cation exchanger)  3mol

    3 mol of HCl are produced from 1 mol of the complex i.e.

    CoNH36Cl33HCl

    266.4g 3(1+35.5)=109.5g

    266.4 g complex liberated HCl = 109.5 g 

    1g complex liberated HCl=109.5266.4g=0.411g

    Hence one litre solution contain HCl=0.411g

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