1) An ammonia/ammonium buffer solution contains 0.40 M NH3 and 0.67M. NH4+.?
The Kb value of ammonia is 1.8 x10^-5. Calculate the pH of this buffer

2) A lactic acid/lactate ion buffer solution contains 0.24M HC3H5O3 and 0.66 M C3H5O3- , respectively. The Ka value of lactic acid is 1.4 x10^-4. Calculate the pH of this buffer.

Question

1) An ammonia/ammonium buffer solution contains 0.40 M NH3 and 0.67M. NH4+.?
            The Kb value of ammonia is 1.8 x10^-5. Calculate the pH of this buffer

2) A lactic acid/lactate ion buffer solution contains 0.24M HC3H5O3  and 0.66 M C3H5O3- , respectively. The Ka value of lactic acid is 1.4 x10^-4. Calculate the pH of this buffer.

mos1635 · Answer

isn;t there a formula henderson-hanselba(somethinh) ?

jfraser · Answer

henderson hasselbalch:
$$pH = pKa + \log(\frac{base}{acid})$$ all 4 are given, find pH.