Arsenic acid is a triprotic acid with the pKa values pKal = 2.240, pK2 = 6.960, and pK = 11.500. You wish to prepare 1.000 L of a 0.0100 M arsenate buffer at pH 6.380. To do this, you choose to mix the two salt forms involved in the second ionization, NaH, AsO, and Na, HASO,, in a 1.000 L volumetric flask and add water to the mark. What mass of each salt will you add to the mixture? mass NaH, AsO, = mass Na, HASO, %3D
Arsenic acid is a triprotic acid with the pKa values pKal = 2.240, pK2 = 6.960, and pK = 11.500. You wish to prepare 1.000 L of a 0.0100 M arsenate buffer at pH 6.380. To do this, you choose to mix the two salt forms involved in the second ionization, NaH, AsO, and Na, HASO,, in a 1.000 L volumetric flask and add water to the mark. What mass of each salt will you add to the mixture? mass NaH, AsO, = mass Na, HASO, %3D
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11.500.
You wish to prepare 1.000 L of a 0.0100 M arsenate buffer at pH 6.380. To do this, you choose to mix the two salt forms
involved in the second ionization, NaH, AsO, and Na, HASO,, in a 1.000 L volumetric flask and add water to the mark. What
4
mass of each salt will you add to the mixture?
mass NaH, AsO, =
mass Na, HASO,
en"
Transcribed Image Text:Arsenic acid is a triprotic acid with the pKa values pKa = 2.240, pK2 = 6.960, and pK
11.500.
You wish to prepare 1.000 L of a 0.0100 M arsenate buffer at pH 6.380. To do this, you choose to mix the two salt forms
involved in the second ionization, NaH, AsO, and Na, HASO,, in a 1.000 L volumetric flask and add water to the mark. What
4
mass of each salt will you add to the mixture?
mass NaH, AsO, =
mass Na, HASO,
en
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