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                     1.  Jelaskanlah  sistem  penyangga  yang  ada  di  dalam  tubuh  makhluk
                     hidup? (min 2 buah)
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                     2. 150 mL NH 3 0,2 M (Kb = 10 ) dicampurkan dengan 100 mL HNO 3 0,1
                                                       −5
                     M. Tentukan pH larutan jika log 2 = 0,3
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