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1 Liter NH₃ ===> 0,1 M (Kb = 10⁻⁵)
1 liter HCl ===> 0,1 M
Menurut Reaksi:
NH₃ + HCl ====> NH₄Cl
mula 0,1 mol 0,1 mol
reaksi -0,1 mol -0,1 mol + 0,1 mol
sisa - - 0,1 mol
karena hanya garam yang dihasilkan, kita pakai konsep Hidrolisi garam.
Molaritas NH₄Cl = = = 0,05 M
Hidrolisi garam: (garam bersifat asam)
[H⁺] =
[H⁺] =
[H⁺] =
[H⁺] =
[H⁺] = 10⁻⁵
pH = - log 10⁻⁵ = 5 (jawaban A)
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