Question

Calculate the ph of 0.74 g/l aqueous solution of propane diamine

Answer 1

pH = - log H+

propane diamine is relatively a base.
so we will calculate pOH.

pOH = - log (74/100)
=. -(-2) log 74 × 10
= 2 log 740
=
$2 log(740) = 5.74$
hence, pOH = 5.74
now
we know that
pH + pOH = 14
pH + 5.74= 14
pH = 14-5.74
pH =8.26