Jawabanmu

2014-04-20T07:59:01+07:00
★ pH = 9 --> pOH = 14 - 9 = 5 --> [OH-] = 10^-5 ★[garam] = 10^-1 ★Kb = 2 × 10^-5 ★ gunakan rumus larutan penyangga basa [OH-] = Kb × [NH3] / [garam] [NH3] = [OH-] × [garam] / Kb = 10^-5 × 10^-1 / 2 × 10^-5 [NH3] = 5 × 10^-2 <------