... 0, 693 1,54 .10 10 t1/2 4,51 .109 k 13, 2 .10 6 3, 42 .10 6 (mol nguyên tử), N ( mol ng tử ) 238 206 13, 2 .10 6 3, 42 .10 6 No ( mol nguyên tử) 238 206 13, 2 .10 6 3, 42 .10 6 No 238 206 ... Fe3 ] 10 37,42 10 14,78 ;[ Fe 2 ] [OH ]3 [OH ]2 EFe3 / Fe2 0, 77 0, 059 lg [ Fe3 ] 10 37,42 .101 4,78 0, 77 0, 059 lg [ Fe 2 ] [OH ] mà [OH-][H+] = 10- 14 10 37,42 .101 4,78 ... a ( NH ) KW K b ( NH3 ) 5, 6 .10 10 0,25đ 0,25đ CH3COO H2O K b (CH COO ) KW 5, 6 .10 10 K a (CH3COOH ) Vì K b (CH COO ) = K a ( NH ) = 5,6 .10- 10 ; Do H 0,25đ CH3COO...