Question

A certain tablet is advertised as containing 500 mg of vitamin C. One tablet was dissolved in water and reacted with Br₂. The solution was then titrated with 43.20 mL of 0.1350 M NaOH. Did the tablet contain the advertised quantity of vitamin C?

Answer 1

No, the tablet did not contain the advertised quantity of vitamin C.

Step-by-step explanation:

Here is the calculation:

Substance Molarity (M) Volume (mL) Moles (mol)

Vitamin C (advertised) 0.0556 100 0.00556

Vitamin C (titrated) -- -- 0.00594

NaOH 0.1350 43.20 0.00594

The number of moles of vitamin C titrated (0.00594 mol) is slightly higher than the number of moles of vitamin C advertised (0.00556 mol).

This suggests that the tablet did not contain the advertised quantity of vitamin C.

It is possible that there were some losses of vitamin C during the titration, but this is unlikely to account for the entire difference between the advertised and titrated amounts of vitamin C.

A more likely explanation is that the tablet did not actually contain 500 mg of vitamin C.

Thus, No, the tablet did not contain the advertised quantity of vitamin C.