Crush up a single tablet (500mg) in about 50mL of distilled water until complete

Question

Crush up a single tablet (500mg) in about 50mL of distilled water until completely dissolved, then transfer the entire solution to a 100mL volumetric flask and filled to the mark. This is your stock solution, from which you pipette 5 mL to titrate with the provided iodine solution (.005 mol/L)
I need to find: 1: the volume of vitamin c 2: the molarity of vitamin c And 3: the mass of vitamin c
B. Analysis of Vitamin C tablet Mass of pill 0. g Trial 1 Trial 2 Trial 3 ,005 Mol X103 Titration Final reading 32.lmL 30.5mL Initial reading ML mL 32, TAL 30. Lmb Volume of Iodine soln 302. ImL Calculations Moles of I2 MO Moles of Vit C

Explanation / Answer

Volume of Vit C for each titration = 5mL

During the titration 1 mol I2 reacts with1mol Vit C (ascorbic acid)

Moles of I2 = moles of ascorbic acid

Moles of I2 = Molarity of I2 solution * volume required for titration in L

Trial 1 = 0.005 M *0.0321 L =1.61*10^-4 mol

Trial 2 = 0.005 M * 0.0327 L =

Trial 3 : 0.005 * 0.0304 L =

So, moles of VitC in three trials are :

Trial 1 : 1.61*10^-4 mol

Trial 2 : 1.64*10^-4 mol

Trial 3 : 1.52*10^-4 mol

Molarity of Vit C : = number of moles/0.005 L

Trial 1 : 1.61*10^-4/0.005 = 0.0322 M

trial2 : 1.64*10^-4/0.005 = 0.0328 M

Trial 3 : 1.52*10^-4/0.005 = 0.0304 M

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