Phosphoric acid is a triprotic acid with the pK, values pK1 = 2.148, pK2 = 7.198, and pK3 = 12.375. You wish to prepare 1.000 L of a 0.0600 M phosphate buffer at pH 7.480. To do this, you choose to mix the two salt forms involved in the second ionization, NaH,PO, and Na, HPO,. 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, PO, mass Na, HPO, = What other combination of phosphoric acid and its salts could be mixed to prepare this buffer? NaH,PO, and Na, PO, ОНРО, and Na, PO, Н, РО, and NaH, PO, |Н, РО, and Na,HPO, O Na, HPO, and Na, PO,

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Phosphoric acid is a triprotic acid with the pK, values pKa1 = 2.148, pK2 = 7.198, and pK3 = 12.375.
You wish to prepare 1.000 L of a 0.0600 M phosphate buffer at pH 7.480. To do this, you choose to mix the two salt forms
involved in the second ionization, NaH, PO, and Na, HPO,. 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, PO, =
mass Na, HPO, =
ISS
What other combination of phosphoric acid and its salts could be mixed to prepare this buffer?
NaH,PO, and Na,PO,
H,PO, and Na, PO,
H, PO, and NaH, PO,
Н, РО, and Na, HPO,
Na, HPO, and Na, PO,
Transcribed Image Text:Phosphoric acid is a triprotic acid with the pK, values pKa1 = 2.148, pK2 = 7.198, and pK3 = 12.375. You wish to prepare 1.000 L of a 0.0600 M phosphate buffer at pH 7.480. To do this, you choose to mix the two salt forms involved in the second ionization, NaH, PO, and Na, HPO,. 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, PO, = mass Na, HPO, = ISS What other combination of phosphoric acid and its salts could be mixed to prepare this buffer? NaH,PO, and Na,PO, H,PO, and Na, PO, H, PO, and NaH, PO, Н, РО, and Na, HPO, Na, HPO, and Na, PO,
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