Question

 
Calculate the amount of ascorbic acid in the Vitamin C tablet in (mg).  =?

A vitamin C (ascorbic acid) tablet was dissolved in approximately 50 mL of distilled water and titrated with the standardized NaOH solution. From 
the results of this titration, the mg of ascorbic acid in the tablet was calculated.
Molecular formulas:
Potassium hydrogen phthalate: HKC8H4O4
Acetic acid: C2H4O2
Ascorbic acid: C6H8O6
Assume that all 3 acids are monoprotic acids.



Mass of KHP used for standardization (g) 0.5464
Volume of NaOH required to neutralize KHP (mL) 13.31
Volume of vinegar sample titrated (mL) 5.00
Volume of NaOH required to neutralize vinegar in (mL) 8.40
Molecular weight of ascorbic acid (g/mol) 176.1271
Volume of NaOH required to neutralize ascorbic acid in Vitamin C tablet (mL) 13.85

What is the Molecular Weight of KHP (HKC8H4O4) in g/mol? 204.2220 
How many moles of KHP were used in the standardization of the NaOH solution? 0.002595
Calculate the concentration of NaOH solution in (mol/L). 0.188433
Calculate the molarity of the vinegar solution (mol/L). 0.303377