Hitung lah [H+] dan [OH-] yg terdapat falam larutan NH4OH 0,4 M. (Kb=1×10-5)
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Pertanyaan
Hitung lah [H+] dan [OH-] yg terdapat falam larutan NH4OH 0,4 M. (Kb=1×10-5)
1 Jawaban
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1. Jawaban Robinn
[OH-] = √kb . [NH4OH]
[OH-] = √10^-5 . 4 x 10^-1
[OH-] = √4 x 10^-6
[OH-] = 2 x 10^-3
[OH-] [H+] = Kw
2 x 10^-3 [H+] = 10^-14
[H+] = 10^-14 / 2 x 10^-3
[H+] = 10^-11 / 2
[H+] = 0,5 x 10^-11