A buffer is 0.36 M in HNO2 and 0.21 M in NaNO2. If the ionization constant of HNO2 is 4.5 x 10^ -4, calculate the pH of the buffer.
2007-04-05 08:59:30 · 3 answers · asked by michiusa 1 in Science & Mathematics ➔ Chemistry
The Henderson-Hasselbalch equation is
pH = pKa + log([A-]/[HA]) and pKa = -logKa
In your case, [A-] = nitrite concentration from NaNO2
[HA] = HNO2
pH = -log(4.5E-4) + log(.21/.36)
pH = 3.11
2007-04-11 14:12:46 · answer #1 · answered by pandNH4 2 · 2⤊ 0⤋
Calculate Ph Of Buffer
2016-11-12 04:53:11 · answer #2 · answered by ? 4 · 0⤊ 0⤋
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calculate the pH of the buffer?
A buffer is 0.36 M in HNO2 and 0.21 M in NaNO2. If the ionization constant of HNO2 is 4.5 x 10^ -4, calculate the pH of the buffer.
2015-08-18 19:07:30 · answer #3 · answered by Shalon 1 · 0⤊ 0⤋
Use the Henderson-Hasselbalch equation. Convert Ka into pKa and plug the values you have into the equation.
2007-04-05 09:05:37 · answer #4 · answered by hcbiochem 7 · 1⤊ 0⤋