tentukan ph larutan 50 ml NH3 0,2 M (kb NH3= 1,8 x 10^-5)
Kimia
yemima142
Pertanyaan
tentukan ph larutan 50 ml NH3 0,2 M (kb NH3= 1,8 x 10^-5)
1 Jawaban
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1. Jawaban tichamarlenza
[OH-] = âKb . Mb = â1,8 x 10^-5 . 0,2 M = â 3,6 x 10^-6 = 1,897 x 10^-3
POH = - log [OH-] = -log 1,897 x 10^-3 = 3 - log 1,897 = 3 - 0,278 = 2,72
PH = 14 - 2,72 = 11,28