Ana Lec Finals Flashcards
a mixture of a weak acid and its
conjugate base or a weak base and its
conjugate acid that resists changes in pH of a
solution.
Buffer
is a solution of
a conjugate acid / base pair that resists
changes in pH.
Buffer solution
is the number
of moles of strong acid or strong base that
causes one liter of the buffer to change pH by
one unit.
Buffer capacity
the solution contains
only the conjugate of the weak acid or base being titrated and the pH is calculated from the concentration of this product.
Equivalence point
______ cause the most
pronounced change in pH at the equivalence
point.
Strong base and strong acid
widely used for titration
of bases.
Hydrochloric acid
perchloric acid and sulfuric acid are also stable
and are useful for nitric acid are seldom
encountered because of their
Oxidizing property
second end point is always used for
Standardization
At ___ we calculate the
pH from the molar concentration of unreacted
acid.
Pre equivalence point
the solution is
neutral and pH=7.00.
Equivalence point
We calculate the pH
Post equivalence point
the solution contains only a
weak acid or a weak base, and the pH is calculated
from the concentration of that solute and its
dissociation constant.
Pre equvalence point
the excess of
strong acid or base titrant represses the acidic or
basic character of the reaction product
Post equivalence point
the solution contains
only the conjugate of the weak acid or base being
titrated
Equivalence point
