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Chemistry
Chemistry
Problem
A weak monoprotic acid HA is titrated with a strong base. At the half-equivalence point, which relationship between the measured pH of the solution and the acid’s dissociation constant is correct? a)
pH
=
14
−
p
K
a
\text{pH} = 14 - pK_a
pH
=
14
−
p
K
a
b)
pH
=
p
K
a
2
\text{pH} = \dfrac{pK_a}{2}
pH
=
2
p
K
a
c)
pH
=
p
K
a
\text{pH} = pK_a
pH
=
p
K
a
d)
pH
=
7
+
p
K
a
2
\text{pH} = 7 + \dfrac{pK_a}{2}
pH
=
7
+
2
p
K
a
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