Question

calculate the mass (in mg) of each vitamin c tablet

vdamum C uoa natuu made Viamelts Omg vil c uwghe utatio tmdlme) 6ml tabluts tablut l 0.u6299 tablts 0.u50rg 6mL 10.2n Alblu 3 16.2mL 15. Come

Answer 1

The tablet 1 sample requires 5 - 0 = 5 mL of titrant (NaOH or KOH) for the titration of 0.4515 g of the sample.

The tablet 2 sample requires 10.2 - 5 = 5.2 mL of titrant (NaOH or KOH) for the titration of 0.4529 g of the sample.

Tablet 3 sample requires 15.6 - 10.2 = 5.4 mL of titrant (NaOH or KOH) for the titration of 0.4508 g of the sample.

Here, if the molarity of titrant (NaOH or KOH) is not given. If you have that value, you can follow the procedure shown below.

Let 'x' be the molar concentration of titrant.

Tablet 1. The moles of ascorbic acid in tablet 1 = x mmo/mL* 5 mL = 5*x mmol

i.e. The mass of ascorbic acid in tablet 1 = 5*x mmol * 176 g/mol = 0.880*x g

Tablet 2. The moles of ascorbic acid in tablet 1 = x mmo/mL* 5.2 mL = 5.2*x mmol

i.e. The mass of ascorbic acid in tablet 1 = 5.2*x mmol * 176 g/mol = 0.915*x g

Tablet 3. The moles of ascorbic acid in tablet 1 = x mmo/mL* 5.4 mL = 5.4*x mmol

i.e. The mass of ascorbic acid in tablet 1 = 5.4*x mmol * 176 g/mol = 0.95*x g