Page 63 - E-Modul Larutan Penyangga Berbasis Guided Inquiry
P. 63
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NH4OH ⇄ NH4 + OH
Cb (1-α) αCb αCb
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[NH4OH] ≅ Cb dan [NH4 ] ≅ Cg
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Kb = [ 4 + ] [ ]
[ ]
4
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4
[OH ] = Kb [ ]
[ 4 + ]
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[OH ] = Kb
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[OH ] = Kb [ ℎ]
[ ]
Perhitungan pH larutan penyangga basa menggunakan
rumus:
pOH = -log [OH ]
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pH = 14-log pOH
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3. Perhitungan pH Larutan Penyangga
