0 buffer explain ph pk a 1 specify the chemicals and

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Unformatted text preview: listed in the table below to make a pH pH = 3.0 buffer. Explain. pH = pK a ± 1 Specify the chemicals and proportions you would choose from among these listed in the table below to make a pH = 3.0 buffer. Explain. pH = pKa + log (base/acid) 3.0 = -log(6.8×10-4) + log (base/acid) 3.0 = 3.167 + log (base/acid) -0.167 = log (base / acid) ([NO2- ] / [HNO2]) = 0.68 Proportion: 0.68 mole NO2-/1 mole HNO2 0.68 Specify the chemicals and proportions you would choose from among these listed in the table below to make a pH = 3.0 buffer. Explain. pH = pKa + log (base/acid) 3.0 = -log(4.5×10-4) + log (base/acid) 3.0 = 3.347 + log (base/acid) -0.347 = log (base / acid) (NO2-1 / HNO2) = 0.45 Proportion: 0.45 mole NO2-/1 mole HNO2...
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