Step-by-step explanation:
It is given that mass of ascorbic acid = 0.287 g
As molar mass of ascorbic acid is 176.12 g/mol. Hence, calculate its number of moles as follows.
moles ascorbic acid =
moles ascorbic acid =
=
mol
So, moles of
=
=
=
mol
Therefore, moles NaOH required = moles
moles NaOH required =
mol
Now, we will calculate the volume of NaOH as follows.
volume NaOH =
volume NaOH =

= 0.0652 L
or, = 65.2 mL (as 1 L = 1000 ml)
Thus, we can conclude that the volume of NaOH required is 65.2 ml.