(b) a mixture containing 0.136 M HC 3 H 5 O 2 and0.136 M NaC 3 H 5 O 2 pH_______

Question

(b) a mixture containing 0.136M HC3H5O2 and0.136 MNaC3H5O2
pH____________

percent dissociation___________% Thedifference is due to the entropy effect.
Thedifference is due to the common ion effect.
Thedifference is due to the temperature effect.
Thedifference is due to the pH effect.
Thedifference is due to the equilibrium effect.
Thedifference is due to the entropy effect.
Thedifference is due to the common ion effect.
Thedifference is due to the temperature effect.
Thedifference is due to the pH effect.
Thedifference is due to the equilibrium effect.

Explanation / Answer

formula for caliculating pH of weak acid is;pH=1/2(PKa-log c) here Ka=1.3*10-5 pKa=-log(1.3*10-5) =5-0.1139 =4.866 pH= 1/2(4.88-LOG 0.136)      = 1/2(5.7252) =2.8762 B) for buffer solution pH= PKa+log(salt/acid)           =4.88+log0(.136/0.136)          =4.88 B) for buffer solution pH= PKa+log(salt/acid)           =4.88+log0(.136/0.136)          =4.88

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