Liquid ammonia ionises to a slight extent. Its self ionisation constant is 10^(-30)at - 50^(@)C, then the numberofamide iona present per1 cc of it at -50^(@)C is

Liquid ammonia ionises to a slight extent. Its self ionisation constan

1.	Liquid ammonia ionises to a slight extent. Its self ionisation constant is 10^(-30)at - 50^(@)C, then the numberofamide iona present per1 cc of it at -50^(@)C is
Answer» `6XX 10 ^(12) ` ` 3xx10^(12) ` ` 6xx10 ^(5) ` ` 3xx10^(3) ` Solution :` NH_3 hArr NH_2^(-)+H^(+) ` ` K = [NH_2^(-)][H^(+) ] = 10 ^(-30 ) ` ` [NH_2 ^(-) ] =sqrt( 10^(-30)) = 10 ^(-15) ` `" Moles of " NH_2^(-)= 10 ^(-15) xx (1)/( 1000)= 10 ^(-18) ` ` therefore"No . of" NH_2^(-)" ions "10 ^(-18)xx 6 xx 10 ^(23)= 6 xx 10 ^(-5)`