Answer
The necessary volume for this tritation is $29.2$ ml of $HCl$
Work Step by Step
1. Find the volume necessary for an equal number of moles:
$C_1 * V_1 = C_2 * V_2$
$ 0.175* 25= 0.15 * V_2$
$ 4.375 = 0.15 * V_2$
$V_2 = 29.2$ ml.