Question

question 7
if ha is a stronger acid than hb, then
a- is a weaker base than b-
a- is a stronger base than b-
a- and b- have the same strength
question 8
pka is
-log h+
-log ka
-logoh-
-log kb

Explanation:

Question 7

The stronger the acid, the weaker its conjugate base. Since HA is a stronger acid than HB, \(A^-\) (conjugate base of HA) is a weaker base than \(B^-\) (conjugate base of HB).

By definition, \(pK_a=-\log K_a\), where \(K_a\) is the acid - dissociation constant. \(-\log[H^+]\) is \(pH\), \(-\log[OH^-]\) is \(pOH\), and \(-\log K_b\) is \(pK_b\).

Answer:

A. \(A^-\) is a weaker base than \(B^-\)

Question 8