\( \mathrm{pK}_{\mathrm{a}} \) of a weak acid (HA) and \( \mathrm{p...

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\( \mathrm{pK}_{\mathrm{a}} \) of a weak acid (HA) and \( \mathrm{pK}_{\mathrm{b}} \) of a weak base
P \( (\mathrm{BOH}) \) are 3.2 and 3.4 , respectively. The \( \mathrm{pH} \) of their

W salt \( (\mathrm{AB}) \) solution is:
(1) 6.9
(2) 7.0
(3) 1.0
(4) 7.0
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