Jawabanmu

Jawaban paling cerdas!
2014-02-13T08:54:49+07:00
Campuran tersebut merupakan penyangga basa.

pH = 9 - log 2 = -log 2x10^-9
[H+] = 2x10^-9
[OH-] = Kw/[H+] = 10^-14 / 2x10^-9 = 5x10^-6

[OH-] = Kb x (n NH3 / n NH4 +)

n NH3 ....... [OH-] ... 5x10^-6 .... 5x10^-6 .... 1
------------- = --------- = ------------ = -------------- = ----
n NH4 + ..... Kb ....... 10^-5 ..... 10x10^-6 ... 2

(NH4)2SO4 -> 2NH4^+ + SO4^2-
... 1 mol ........ 2 mol ...... 1 mol

Jadi Perbandingan X dan Y adalah 1 : 1
1 5 1