beregn den formelle koncentration af ammoniumchlorid i denne opløsning

Denne opgave omhandler to uorganiske ionforbindelser (salte).
I tabellen nedenfor er angivet styrkekonstanter (25 °C) for en række korresponderende syre-base par.

                              KS       mol/L                            KB   mol/L

                              NH4+
                             5,62 · 10−10

                                                                                 NH3
                                                                                1,78 · 10−5

                               HCO3−
                              4,79 · 10−11
                                                                                    CO32−
                                                                                    2,09 · 10−4

                                HCl
                                Ca. 1 · 107
                                                                                    Cl−
                                                                                   Ca. 1 · 10−21

I en vandig opløsning af ammoniumchlorid måles pH til 5,1.

B) Beregn den formelle koncentration af ammoniumchlorid i denne opløsning.