One liter of 0.1 m tris buffer is prepared and adjusted to ph of 8.2.
(a) write the equation o...
Chemistry, 02.10.2019 22:00, destinytofell4630
One liter of 0.1 m tris buffer is prepared and adjusted to ph of 8.2.
(a) write the equation of the acid dissociation of tris-hcl identifying the weak acid and the conjugate base in your equation. (the structure of tris-hcl salt is shown on the lecture slides and pka=8.30).
(b) what is the effective buffering range of a tris buffer?
(c) what are the concentrations of the conjugate acid and weak base at ph=8.2?
(d) what is the ratio of conjugate base to weak acid if 1.5 ml of 3.0 m hcl is added to 1.0 l of the buffer? what is the new ph? has the buffer functioned effectively? compare the ph change to that of problem 9a in which the same amount of acid was added to the same volume of pure water.
(e) what is the ratio of conjugate base to weak acid if 1.5 ml of 3.0 m naoh is added to 1.0 l of the buffer? what is the new ph? has the buffer functioned effectively? compare the ph change to that of problem 3b in which the same amount of base was added to the same volume of pure water.
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