question_answer

A buffer with pH 9 is to be prepared by mixing \[N{{H}_{4}}Cl\] and \[N{{H}_{4}}OH.\] Calculate the number of mole of \[N{{H}_{4}}Cl\]that should be added to one litre of 1 M \[N{{H}_{4}}OH.\left( {{K}_{b}}=1.8\times {{10}^{-5}} \right)\]

Answer:

1.80